Warming up an IP address refers to gradually increasing email volume over time from a new IP address that has not previously sent email. It is important for IP addresses used to send large volumes of email to be warmed up correctly to avoid issues with deliverability. A good warm up involves starting with low volumes from engagement lists and gradually increasing over a period of 2-3 weeks until reaching the intended monthly volume. Factors like open and click rates should be monitored during the warm up process.
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ISPs Like It Hot: How to Warm Up an IP
1. ISPs Like It Hot:
How to Warm Up an IP
Katie Nelson & Aku Desai
Senior Technical Account Managers
February 11, 2014
2. Housekeeping
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3. Company Overview
• Founded July 2009
$27M venture capital raised
Series B closed Jan 2012
• TechStars graduate
(Boulder, CO)
• 180 employees across 4 offices
– CO: Boulder, Denver
– CA: Anaheim
– Rhode Island, Romania, UK
Angel investors include:
-Scott Petry (Founder, Postini)
-Matt Mullenweg (Founder, Wordpress)
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4. Delivering Email at Scale
• Serving 100,000+ customers
across the globe
• Sending over 10 billion emails
per month = 2% of the world’s
non-spam email
• Transactional and marketing
email solutions
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5. Today’s Speakers
Aku Desai
Sr. Technical Account Manager
aku.desai@sendgrid.com
Katie Nelson
Sr. Technical Account Manager
katie.nelson@sendgrid.com
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7. : [v.]
Warming up an IP address means that
you start sending low volumes of email
on your dedicated IP and then
systematically increase your email
volume over a period of time.
8. : [n.]
An IP address that is new and has
never had any mail sent through it, and
therefore has no reputation.
9. Bad Warm Up
New IP Address
Good Warm Up
New IP Address
35. Takeaways
• Every sender is different- talk to your email
service provider for more personalized
advice
• Warm up helps the ISPs get to know you
as a sender
• We are here to help!
– TAMS
– Support Team
Transactionalvs.MarketingWarm up approach dependent on type of email sending (more engagement on transactional)
Look at what segment of your email file has best opens and clicks and send that
Right message, Right time, right frequency.Who are these engaged users? Look at metrics, engagement data.
Look at metrics, engagement data, Event Webhook
Keep warm across all ISPs- Why?
You’re left out in the cold…like a lonely penguin…
ThrottlingDeferDrop
Example from an actual customer- explain graphic
Instant deferred by ISPs, likely get blocked all together
Spend all your time on mess clean up…ISPs don’t like to be surprisedTell story about bad warm up
Dangers of IP rotation.Easily detected by ISPsSnowshoeingESPs don’t allow this@ SendGrid you have to go through a human/rep to get a new IP, so we pick up on this quickly
New topic intro
Recommend you warm up a domain the same way as an IP (go hand in hand)
Engagement metrics (clicks, opens, etc.)Blocks, deferralsStore it somewhereMake sense of your data
Consistency, reputation systems store for 30 days, and don’t be erratic