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      "postuid": "d18d12b5-ada5-418b-85d6-b304cc5a9c3a",
      "tenantuid": "d8b744fc-2e70-4089-bb80-dd1d08f6c7b2",
      "projectuid": "239698c5-f7eb-4574-8cc8-c6568f08b3a0",
      "title": "How to warm-up an email IP address",
      "slug": "article/how-to-warm-up-an-email-ip-address",
      "html": "\u003Cp\u003EWhen you transition from one \u003Ca href=\u0022https://www.dailystory.com/blog/esp-email-marketer/\u0022\u003EEmail Service Provider (ESP)\u003C/a\u003E to another you will change IP addresses too - and possibly use an IP address that has never been used to send email before. \u003Cb\u003EBecause the \u003Ca href=\u0022https://www.dailystory.com/glossary/ip-address/\u0022\u003EIP address\u003C/a\u003E is new, you will need to warm-up the new IP address and domain to ensure proper \u003Ca href=\u0022https://www.dailystory.com/blog/inbox-placement-9-tips-to-help-your-email-get-seen/\u0022\u003Eemail delivery\u003C/a\u003E\u003C/b\u003E.\n\nYou effectively are going through the process of ensuring email providers see your sending IP address as reputable and trustworthy. IP address warmup creates a positive reputation for your IP address.\u003C/p\u003E\u003Ch2 id=\u0022what_about_low_volume_senders\u0022\u003EWhat about low volume senders?\u003C/h2\u003E\u003Cp\u003ELow volume senders are brands sending less than 50,000 emails per-month or sending primarily \u003Ca href=\u0022https://www.dailystory.com/blog/transactional-email/\u0022\u003Etransactional emails\u003C/a\u003E vs. bulk marketing emails. And, as a low volume sender you can usually get by without following a warm-up schedule. But we do still recommend following the other recommendations in this article.\u003C/p\u003E\u003Ch2 id=\u0022what_do_email_providers_consider_as_part_of_ip_reputation\u0022\u003EWhat do email providers consider as part of IP reputation?\u003C/h2\u003E\u003Cp\u003EThere are many factors that determine your IP address sending reputation. Some of which include:\u003C/p\u003E\u003Cul\u003E\u003Cli\u003E\u003Cb\u003EValid email authentication\u003C/b\u003E - is the sender properly configured for \u003Ca href=\u0022https://www.dailystory.com/glossary/dkim/\u0022\u003EDKIM\u003C/a\u003E and \u003Ca href=\u0022https://www.dailystory.com/glossary/spf/\u0022\u003ESPF\u003C/a\u003E?\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EValid MX records\u003C/b\u003E - are the \u003Ca href=\u0022https://www.dailystory.com/glossary/mx/\u0022\u003EMX records\u003C/a\u003E valid?\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EBlacklists\u003C/b\u003E - is the sender\u0027s IP address or domain on an \u003Ca href=\u0022https://www.dailystory.com/glossary/email-blacklist/\u0022\u003Eemail blacklist\u003C/a\u003E?\u003C/li\u003E\u003Cli\u003E\u003Cb\u003ESPAM reports\u003C/b\u003E - was is the frequency of SPAM reports for emails from the IP address?\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EBounce rate\u003C/b\u003E - is the sender attempting to deliver to a high number of invalid inboxes that bounce?\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EEngagement rate\u003C/b\u003E - is the recipient open the email or moving it straight to the trash?\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EUnsubscribe requests\u003C/b\u003E - how many unsubscribe requests are recipients making?\u003C/li\u003E\u003C/ul\u003E\u003Cp\u003EThere are other factors that some email providers use for measurement too.\u003C/p\u003E\u003Ch2 id=\u0022what_happens_when_you_dont_properly_warmup_an_ip_address\u0022\u003EWhat happens when you don\u0027t properly warm-up an IP address\u003C/h2\u003E\u003Cp\u003EWhen email systems, such as Microsoft, Gmail, AOL and others see activity from a new IP address they often delay delivery (known as a \u003Ca href=\u0022https://www.dailystory.com/glossary/soft-bounce/\u0022\u003Esoft bounce\u003C/a\u003E) of those emails until the IP address appears to be trusted. Or worse, they will route the emails to the junk / spam folder.\u003C/p\u003E\u003Cul\u003E\u003Cli\u003E\u003Cb\u003EHigh number of soft-bounces\u003C/b\u003E - it is likely that during the warm-up of your IP address you will see a high number of soft-bounces. A soft-bounce if a mailbox provider delaying the delivery of your message because it detects an unusual spike in volume from an an unknown IP address.\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EDecrease in inbox placement\u003C/b\u003E - as your IP reputation grows, so will your \u003Ca href=\u0022https://www.dailystory.com/blog/inbox-placement-9-tips-to-help-your-email-get-seen/\u0022\u003Einbox placement\u003C/a\u003E (vs ending up in SPAM folder). Unfortunately this takes time and there is no set guidance. However, you can encourage your customers to white label your domain.\u003C/li\u003E\u003C/ul\u003E\u003Ccite class=\u0022warning\u0022\u003E\u003Cspan class=\u0022title\u0022\u003EWarning\u003C/span\u003E\u003Cp\u003EEmail providers distrust new IP addresses because spammers often switch IP addresses and send high volumes of email.\u003C/p\u003E\u003C/cite\u003E\u003Cp\u003EThis process, known as warming up an IP address, describes the steps you should take and what you should expect when sending email from a new IP address. This allows your sending reputation to build over time as your customers accept your messages.\u003C/p\u003E\u003Ccite class=\u0022warning\u0022\u003E\u003Cspan class=\u0022title\u0022\u003EWarning\u003C/span\u003E\u003Cp\u003EWarming up an IP address can take 30-90 days.\u003C/p\u003E\u003C/cite\u003E\u003Ch2 id=\u0022setting_expectations__you_will_need_to_be_patient\u0022\u003ESetting expectations - you will need to be patient\u003C/h2\u003E\u003Cp\u003EWe\u0027d love to tell you that warming up a new IP address is simple. Unfortunately it\u0027s more art than science as each mailbox provider has their own rationale for how they trust a new IP address.\u003C/p\u003E\u003Ch2 id=\u0022what_about_domain_reputation\u0022\u003EWhat about domain reputation?\u003C/h2\u003E\u003Cp\u003EWhen you move ESPs, you are likely transferring a domain that you are already sending messages on. Unfortunately, in our experience, the reputation of the IP address is at least equal that of the reputation of the domain. Or, put another way: even if your domain has a solid reputation from an existing ESP, you will still need to go through the process of warming up the new IP address(es) associated with that sending domain.\u003C/p\u003E\u003Ch2 id=\u0022before_you_start_the_ip_address_warmup\u0022\u003EBefore you start the IP address warm-up\u003C/h2\u003E\u003Cp\u003EBefore you start your IP address warm-up, we recommend following the steps in this checklist.\u003C/p\u003E\u003Ch3 id=\u0022validate_your_email_list\u0022\u003EValidate your email list\u003C/h3\u003E\u003Cp\u003EBefore sending any email to warm-up an IP address we recommend verifying all of the email addresses on your sending list.\n\nDailyStory has several built-in services, such as \u003Ca href=\u0022https://docs.dailystory.com/article/qmc7blnf8l-neverbounce-integration\u0022\u003ENeverBounce\u003C/a\u003E and \u003Ca href=\u0022https://docs.dailystory.com/article/zcxqobnlgh-mailfloss-integration\u0022\u003EMailfloss\u003C/a\u003E. These services are used to validate a list of email addresses to ensure the addresses are still valid.\u003C/p\u003E\u003Ch3 id=\u0022follow_best_practices_for_inbox_placement\u0022\u003EFollow best practices for inbox placement\u003C/h3\u003E\u003Cp\u003EFollow these best practices for \u003Ca href=\u0022https://www.dailystory.com/blog/inbox-placement-9-tips-to-help-your-email-get-seen/\u0022\u003Eemail inbox placement and avoiding the junk folder\u003C/a\u003E.\n\nAt minimum, ensure your \u003Ca href=\u0022https://www.dailystory.com/glossary/dkim/\u0022\u003EDKIM\u003C/a\u003E, \u003Ca href=\u0022https://www.dailystory.com/glossary/spf/\u0022\u003ESPF\u003C/a\u003E and \u003Ca href=\u0022https://www.dailystory.com/glossary/mx/\u0022\u003EMX\u003C/a\u003E records are configured correctly. At DailyStory we require this for all senders of any size.\u003C/p\u003E\u003Ccite class=\u0022recommended\u0022\u003E\u003Cspan class=\u0022title\u0022\u003ERecommended\u003C/span\u003E\u003Cp\u003EWe\u0027re not playing buzzword bingo - SPF, DKIM and DMARC are all requirements for ensuring mailbox providers can trust you as a sender.\u003C/p\u003E\u003C/cite\u003E\u003Ch3 id=\u0022have_good_sender_hygiene\u0022\u003EHave good sender hygiene\u003C/h3\u003E\u003Cp\u003EIn addition to the technical setup of your email sending is correct, it\u0027s also a good practice to ensure your emails follow the \u003Ca href=\u0022https://www.dailystory.com/blog/6-ways-to-comply-with-email-marketing-laws/\u0022\u003Elaws around email marketing\u003C/a\u003E. This includes making it easy for your recipients to optout.\u003C/p\u003E\u003Ch3 id=\u0022consider_a_dedicated_ip_address\u0022\u003EConsider a dedicated IP address\u003C/h3\u003E\u003Cp\u003EMost ESPs, including DailyStory, will often use shared IP addresses. This simply means that you may be sharing the same sending IP address as someone else.\n\nFor many senders, this is not a problem. However, if you are sending to more than 100,000 unique email addresses you may want to consider a dedicated IP address.\u003C/p\u003E\u003Ch4 id=\u0022how_many_ip_addresses_to_i_need\u0022\u003EHow many IP addresses to I need?\u003C/h4\u003E\u003Cp\u003EThe number of IP addresses you should associate with your sending domain is directly correlated to the daily volume you send:\u003C/p\u003E\u003Ctable border=\u00221\u0022 style=\u0022border-collapse: collapse; width: 100%;\u0022\u003E\u003Ctr\u003E\u003Ctd\u003ENumber of IPs\u003C/td\u003E\u003Ctd\u003EDaily Volume\u003C/td\u003E\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003E1-2\u003C/td\u003E\u003Ctd\u003E25,000 \u2013 5,000,000\u003C/td\u003E\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003E2-4\u003C/td\u003E\u003Ctd\u003E5,000,000 \u2013 10,000,000\u003C/td\u003E\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003E4-6\u003C/td\u003E\u003Ctd\u003E10,000,000 \u2013 20,000,000\u003C/td\u003E\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003E6-8\u003C/td\u003E\u003Ctd\u003E20,000,000 \u2013 50,000,000\u003C/td\u003E\u003C/tr\u003E\u003Ctr\u003E\u003Ctd\u003E8\u002B\u003C/td\u003E\u003Ctd\u003E50,000,000\u002B\u003C/td\u003E\u003C/tr\u003E\u003C/table\u003E\u003Ch3 id=\u0022avoid_common_blocklist_words\u0022\u003EAvoid common blocklist words\u003C/h3\u003E\u003Cp\u003EWe\u0027ve put together a list of common \u003Ca href=\u0022https://www.dailystory.com/blog/keyword-blocklists-what-they-do-and-whether-you-should-use-them/\u0022\u003Eblock words\u003C/a\u003E that can cause problems for your emails. Get the \u003Ca href=\u0022https://docs.google.com/spreadsheets/d/1nngfFIQFSGMfdqxoxjgQhHhsRF-VVATHkxidfRWym04/edit?usp=sharing\u0022\u003Efull list as a Google Sheet\u003C/a\u003E or \u003Ca href=\u0022https://github.com/dailystory/blocklist/\u0022\u003Efork it from GitHub\u003C/a\u003E.\u003C/p\u003E\u003Ccite class=\u0022download_file\u0022\u003E\u003Cimg width=\u002240\u0022 src=\u0022https://cdn-us-1.azureedge.net/content-pages/images/google-docs.png\u0022\u003E\u003Cdiv\u003E\u003Ca href=\u0022https://docs.google.com/spreadsheets/d/1nngfFIQFSGMfdqxoxjgQhHhsRF-VVATHkxidfRWym04/edit?usp=sharing\u0022 target=\u0022_blank\u0022 rel=\u0022noopener\u0022\u003E800\u002B Email and SMS Spam Trigger words\u003C/a\u003E\u003Caside\u003EView in Google Docs\u003C/aside\u003E\u003C/div\u003E\u003C/cite\u003E\u003Ccite class=\u0022download_file\u0022\u003E\u003Cimg width=\u002240\u0022 src=\u0022https://cdn-us-1.azureedge.net/content-pages/images/github.png\u0022\u003E\u003Cdiv\u003E\u003Ca href=\u0022https://github.com/dailystory/blocklist/\u0022 target=\u0022_blank\u0022 rel=\u0022noopener\u0022\u003E800\u002B Email and SMS Spam Trigger words\u003C/a\u003E\u003Caside\u003EDownload File\u003C/aside\u003E\u003C/div\u003E\u003C/cite\u003E\u003Ch3 id=\u0022use_audience_segmentation\u0022\u003EUse audience segmentation\u003C/h3\u003E\u003Cp\u003E\u003Ca href=\u0022https://www.dailystory.com/features/segmentation/\u0022\u003ESegmentation\u003C/a\u003E is the process of grouping your contacts by common characteristics. When it comes to warming up your IP address or sending domain you can use segmentation to create smaller audiences that you can use in the warm-up sequence:\u003C/p\u003E\u003Cul\u003E\u003Cli\u003E\u003Cb\u003ESegment by email provider\u003C/b\u003E - Gmail, Hotmail, and Yahoo are common providers.\u003C/li\u003E\u003Cli\u003E\u003Cb\u003ESegment by engagement\u003C/b\u003E - If you are bringing an existing list, who are your most engaged vs. least engaged email addresses.\u003C/li\u003E\u003Cli\u003E\u003Cb\u003ESegment by region\u003C/b\u003E - Especially if you are international. This way you can send email at different times to different segments.\u003C/li\u003E\u003C/ul\u003E\u003Ch3 id=\u0022test_with_your_seed_list\u0022\u003ETest with your seed list\u003C/h3\u003E\u003Cp\u003EBefore sending your emails to your customers, it\u0027s a good idea to test with your \u003Ca href=\u0022https://www.dailystory.com/blog/seed-list/\u0022\u003Eseed list\u003C/a\u003E first.\u003C/p\u003E\u003Ch2 id=\u0022recommend_best_practices_for_ip_address_warmup\u0022\u003ERecommend Best Practices for IP address warm-up\u003C/h2\u003E\u003Cp\u003EBelow are some recommended best practices for warming up a new IP address.\u003C/p\u003E\u003Cul\u003E\u003Cli\u003E\u003Cb\u003EA slow warm-up is best\u003C/b\u003E - it is best to proceed slowly with a new email warm up. If you suddenly see a spike in soft-bounces or failed messages, it\u0027s probably best to slow down the number of messages you are sending.\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EYour results may vary\u003C/b\u003E - different mailbox providers handle the warm up process differently. Some providers, such as Outlook, can take longer than providers such as Gmail.\u003C/li\u003E\u003Cli\u003E\u003Cb\u003ERandomize the warm-up\u003C/b\u003E - if possibly try and randomize the warm-up across mailbox domains. For example, don\u0027t group all AOL emails to send on the same day. Rather, break them up proportionally in your warm-up schedule.\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EStart with your most engaged recipients\u003C/b\u003E - these recipients are ones that routinely interact with your messages, click on your offers, etc. These recipients will help signal to the mailbox provider that your email is legitimate.\u003C/li\u003E\u003Cli\u003E\u003Cb\u003EDistribute sends through-out the day\u003C/b\u003E - rather than sending all of your messages at once, try and distribute the sends through out the day. This will help ensure that mailbox providers don\u0027t see a sudden influx, but gradually warm-up to your new emails.\u003C/li\u003E\u003C/ul\u003E\u003Ch3 id=\u0022encourage_readers_to_mark_messages_as_not_spam\u0022\u003EEncourage readers to mark messages as \u0022not spam\u0022\u003C/h3\u003E\u003Cp\u003ESome mailbox providers will purposefully move email to SPAM to see if readers mark the messages as \u0022not spam\u0022. When warming up an IP address try and reach out to some of your best customer first and ask them to look for your emails.\n\nYour reputation doesn\u0027t transfer - unfortunately your sending reputation does not transfer with your domain, it is attached to the IP address. Mailbox provides like Gmail build reputation on domain plus IP address.\u003C/p\u003E\u003Ch2 id=\u0022an_example_warmup_schedule\u0022\u003EAn example warm-up schedule\u003C/h2\u003E\u003Cp\u003EPutting together a plan for how you warm-up an IP address or set of IP addresses is important. And, you want to make sure you have the time to dedicate to monitoring your email delivery.\n\nFor a known email list, such as when transitioning to \u003Ca href=\u0022https://www.dailystory.com/features/email-marketing/\u0022\u003EDailyStory\u003C/a\u003E from another Email Service Providers, we recommend starting small. If you start seeing \u003Ca href=\u0022/article/h02ufe59wn-troubleshooting-email-delivery\u0022\u003Edelivery issues\u003C/a\u003E, back of your send rates.\u003C/p\u003E\u003Ch3 id=\u0022what_is_an_email_delivery_issue\u0022\u003EWhat is an email delivery issue?\u003C/h3\u003E\u003Cp\u003EA delivery issue is when an email provider prevents delivery of your email. This can be a \u003Ca href=\u0022https://www.dailystory.com/glossary/hard-bounce/\u0022\u003Ehard bounce\u003C/a\u003E (permanent failure) or \u003Ca href=\u0022https://www.dailystory.com/glossary/soft-bounce/\u0022\u003Esoft bounce\u003C/a\u003E (temporary delay). In either case, these are indications that you should slow down your send rate.\n\nFor example, if you routinely send to 100,000 unique email addresses per month, we would recommend a sending schedule as follows:\u003C/p\u003E\u003Ch3 id=\u0022days_1__10__initial_warmup\u0022\u003EDays 1 - 10 - initial warm-up\u003C/h3\u003E\u003Cp\u003ESend 1 percent day 1 and increment by 1%/day for the next 9 days. If any delivery issues occur step back 2% and build up again.\n\nFor a list of 100,000 unique email addresses this means sending to 1,000 on day 1, 2,000 on day 2, etc. By day 10, if everything is running smoothly, you should have sent to over 50% of your list.\u003C/p\u003E\u003Ccite class=\u0022recommended\u0022\u003E\u003Cspan class=\u0022title\u0022\u003ERecommended\u003C/span\u003E\u003Cp\u003EIdeally you are sending to your highest engaged customers in days 1-10.\u003C/p\u003E\u003C/cite\u003E\u003Ch3 id=\u0022days_1130__finish_the_initial_warmup\u0022\u003EDays 11-30 - finish the initial warm-up\u003C/h3\u003E\u003Cp\u003EIncrement the send rate by 2%/day for the next 20 days. Back off by 2-4% if any delivery issues occur.\n\nDuring this phase you may also be sending additional emails to addresses that were sent during the initial warm-up.\u003C/p\u003E\u003Ch3 id=\u0022days_30__60__increase_the_volume\u0022\u003EDays 30 - 60 - increase the volume\u003C/h3\u003E\u003Cp\u003EAt this point everyone on your list has received at least one email, but possibly more. You can now slowly start working up the volume of addresses per-send.\n\nWe recommend incrementing by 5%/send. Back off by 5% if any delivery issues occur.\n\nObviously your results may vary. But the above schedule is a good strategy to start with.\u003C/p\u003E\u003Ch2 id=\u0022during_ip_address_warm_up\u0022\u003EDuring IP Address Warm up\u003C/h2\u003E\u003Cp\u003EDuring the warm up process monitor your ESP\u0027s delivery reports. You are likely going to see a high number of delayed / soft-bounce delivery. This is normal. Also monitor your reputation and that your IP address and/or domain have not been blacklisted.\n\nIf, during your warm up, you start seeing a high number of failures or bonces. It is best to step back to the last point in the warm up where you experienced a high delivery rate.\u003C/p\u003E\u003Ch2 id=\u0022common_mistakes\u0022\u003ECommon mistakes\u003C/h2\u003E\u003Cp\u003EBelow are some common mistakes to avoid when warming up an IP address.\u003C/p\u003E\u003Ch3 id=\u0022send_to_nonengaged_contacts\u0022\u003ESend to non-engaged contacts\u003C/h3\u003E\u003Cp\u003EThe most common mistake - and sometimes done on purpose - is attempting to reactivate unsubscribed or unengaged contacts. It\u0027s important that when you bring data from one ESP to another that you bring this data with you, but that it is imported as opted out.\u003C/p\u003E\u003Ch3 id=\u0022too_aggressive_send_rates_to_email_providers\u0022\u003EToo aggressive send rates to email providers\u003C/h3\u003E\u003Cp\u003EThe next most common mistake is sending too many emails too fast. Some email providers, like Yahoo have limits on how many messages recipients can receive per day. If you start sending thousands of messages a day without properly warming up your IP address and sending reputation, you\u0027ll end up in the junk folder.\u003C/p\u003E\u003Ch2 id=\u0022frequently_asked_questions\u0022\u003EFrequently Asked Questions\u003C/h2\u003E\u003Cp\u003EBelow are some frequently asked questions about how to warm-up an email IP address\u003C/p\u003E\u003Csection class=\u0022faq\u0022\u003E\u003Ch3\u003EWhat about email warm-up products?\u003C/h3\u003E\u003Carticle\u003E\u003Cp\u003EIn the last several years several vendors have started offering email warm-up services. In our experience these services are very hit-and-miss and we typically don\u0027t recommend them. Unfortunately warming up an IP address takes time, but it\u0027s time well spent for better results.\u003C/p\u003E\u003C/article\u003E\u003C/section\u003E\u003Csection class=\u0022faq\u0022\u003E\u003Ch3\u003EWhat about shared IP addresses?\u003C/h3\u003E\u003Carticle\u003E\u003Cp\u003EIf your ESP is using shared IP addresses for sending emails you should still consider warming up your sending domain.\u003C/p\u003E\u003C/article\u003E\u003C/section\u003E\u003Csection class=\u0022faq\u0022\u003E\u003Ch3\u003EWhat size list requires a warm-up?\u003C/h3\u003E\u003Carticle\u003E\u003Cp\u003EWe generally recommend warming up your email list if you have more than 50,000 unique email addresses. Lists lower than that require less process (while still following all the other recommendations). And lists larger than that get exponentially more complex. For example, it\u0027s more difficult warming up a list with 1,000,000 address than one with 100,000.\u003C/p\u003E\u003C/article\u003E\u003C/section\u003E\u003Cp\u003E\u003C/p\u003E\r\n\u003Cscript type=\u0022application/ld\u002Bjson\u0022\u003E\r\n{\r\n  \u0022@context\u0022: \u0022https://schema.org\u0022,\r\n  \u0022@type\u0022: \u0022FAQPage\u0022,\r\n  \u0022mainEntity\u0022: [\r\n{\r\n    \u0022@type\u0022: \u0022Question\u0022,\r\n    \u0022name\u0022: \u0022What about email warm-up products?\u0022,\r\n    \u0022acceptedAnswer\u0022: {\r\n    \u0022@type\u0022: \u0022Answer\u0022,\r\n    \u0022text\u0022: \u0022In the last several years several vendors have started offering email warm-up services. In our experience these services are very hit-and-miss and we typically don\u0027t recommend them. Unfortunately warming up an IP address takes time, but it\u0027s time well spent for better results.\u0022\r\n    }\r\n},\r\n{\r\n    \u0022@type\u0022: \u0022Question\u0022,\r\n    \u0022name\u0022: \u0022What about shared IP addresses?\u0022,\r\n    \u0022acceptedAnswer\u0022: {\r\n    \u0022@type\u0022: \u0022Answer\u0022,\r\n    \u0022text\u0022: \u0022If your ESP is using shared IP addresses for sending emails you should still consider warming up your sending domain.\u0022\r\n    }\r\n},\r\n{\r\n    \u0022@type\u0022: \u0022Question\u0022,\r\n    \u0022name\u0022: \u0022What size list requires a warm-up?\u0022,\r\n    \u0022acceptedAnswer\u0022: {\r\n    \u0022@type\u0022: \u0022Answer\u0022,\r\n    \u0022text\u0022: \u0022We generally recommend warming up your email list if you have more than 50,000 unique email addresses. Lists lower than that require less process (while still following all the other recommendations). And lists larger than that get exponentially more complex. For example, it\u0027s more difficult warming up a list with 1,000,000 address than one with 100,000.\u0022\r\n    }\r\n}\r\n    ]\r\n}\r\n\u003C/script\u003E",
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      "meta_description": "Learn how to warm up an email IP address to ensure proper delivery, build reputation, avoid spam filters, and follow best practices for successful inbox placement.",
      "keywords": "IP address warm-up; email delivery; IP reputation; email authentication; soft bounce; inbox placement; sender hygiene; dedicated IP address; segmentation; delivery issues",
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      "date_published": "2026-03-13T16:35:00",
      "date_updated": "2026-03-20T19:17:34.97",
      "date_created": "2026-03-13T16:31:54.947"
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