What is the recommended daily sending limit for an IP address?
Summary
What email marketers say13Marketer opinions
Email marketer from Reddit shares that it's less about a hard limit and more about engagement. Focus on list hygiene and sending relevant content. If your open/click rates are good, you can send more without issues.
Marketer from Email Geeks explains that every recipient mailbox provider has their own methods for profiling traffic and some use throttling on new IPs. States that your ESP should have intelligence built in so you shouldn't have to worry.
Email marketer from Email Marketing Forum answers that IP warming is essential to avoid spam filters. They need to start slow with sending numbers, and then slowly increase it. Need to also make sure the emails sent are wanted.
Email marketer from Litmus shares that you need to warm up new IP addresses by gradually increasing volume, monitoring deliverability, and segmenting your best contacts first. It depends on list size and engagement.
Marketer from Email Geeks adds if you are moving ESPs with high volumes to warrant multiple dedicated IPs, the migration plan should have addressed this.
Email marketer from Mailjet explains that while there's no hard limit, warming up your IP address gradually is crucial. Start with small batches and increase volume over time. Monitor engagement to avoid deliverability issues.
Email marketer from SendGrid shares that the daily sending limit depends on your plan and IP reputation. They recommend following their IP warmup guidelines, starting with a small number of emails and increasing gradually.
Email marketer from Stack Overflow answers it depends on your mail server configuration and provider restrictions. Start with lower limits and monitor bounces/spam complaints. Adjust sending rates based on feedback.
Marketer from Email Geeks shares that there aren't really global recommendations for IP limits as there are many variables. Notes some clients send millions per hour on one IP.
Email marketer from Email on Acid answers that the focus should be on deliverability and engagement not the actual numbers sent. Sending to engaged subscribers consistently will help keep your IP in good standing.
Marketer from Email Geeks recommends speaking with your ESP. Adds that the IP can send millions per day, but your ESP may have technical limitations.
Email marketer from Quora responds that it depends on the ESP and your sending reputation. If you're starting out, warm up the IP. Aim for consistent sending rather than huge spikes.
Email marketer from MailerLite shares that there aren't any IP address limits but that you need to use IP Warming for any new ones. Start by sending to your most engaged customers.
What the experts say3Expert opinions
Expert from Email Geeks shares that at a million sends a day it's a good idea to get a second IP, but mentions a client sending 20 million a day from a single IP.
Expert from Spam Resource explains that your sending reputation is linked to your IP and domain so you need to protect this by only sending wanted mail. Start new IPs out small and make sure that they are delivered to engaged readers
Expert from Word to the Wise shares that you need to start slow and warm up your IP slowly with a consistent number of emails sent each day that are to engaged users only, building up the reputation over time
What the documentation says5Technical articles
Documentation from SparkPost emphasizes a gradual IP warmup to build a positive sending reputation. Starting with smaller volumes and increasing it incrementally over weeks is advised. Volume depends on list size and engagement.
Documentation from Google Postmaster Tools Help explains that maintaining a good IP reputation is crucial. Volume of email doesn't directly impact reputation, but sudden spikes can affect it. They recommend consistent sending volumes to establish a reputation.
Documentation from RFC Editor explains that SMTP servers can impose rate limits to prevent abuse. There are no specific global daily limits defined, but servers can reject connections or throttle based on various factors.
Documentation from Microsoft explains that they have sending limits to protect their users from spam. These limits are based on your sender reputation and sending history, and increase as you build a good reputation.
Documentation from Amazon SES notes that your sending limits (including daily quota) are automatically increased as you build a good sending reputation. Initial limits are lower and increase over time with positive sending history.