How to avoid the spam police when moving to a new e-mail service provider or IP address.
It's inevitable: at some point, you'll switch to a new e-mail service provider (ESP) or add a new IP address (define). These changes often have a major impact on your deliverability. Once upon a time, switching was easy and painless, but in today's delivery environment it can be quite challenging to get off to a good start.
Today, you must bring your new IP address up to speed slowly, rather than sending full throttle right away. If you switch providers, your new ESP likely will warn you about this, but it applies even if you are adding a new IP to your mail stream, such as for sending transactional messages, new Web sites, or e-mail programs.
Spammers usually leap to a new IP address when they get blocked from an old one, then blast out e-mail right away. ISPs get suspicious when they see e-mail volumes spike from unknown IP addresses, so they block first based on sudden volume spikes and ask questions later. This procedure is called throttling.
If you add an IP address to your mail stream, say, for increasing segmentation or volume, your good reputation on your existing IP address won't automatically transfer to your new one. On the other hand, if you start over after polluting a previous IP address, your bad rep can follow you. That's why you need to take care with your new one.
Today's approach is to begin slowly, sending a limited number of messages to small subsets of the best addresses on your mailing list. As you begin to build your reputation, you can start building your volume, but always while keeping an eye on your deliverability reports and spam-complaint rates.
You should be able to warm up your good reputation in about seven days. Depending on your total message volume, it could take a little longer to reach full capacity.
Organizing Your IP Warm-Up Plan
Your Post-Warm-Up Game Plan
Don't let your new IP address go cold again. Once you complete the warm-up campaign, begin transitioning older, less-active recipients and begin mailing from your regular calendar. Continue to move these addresses over slowly and to build your sending volume over time.
How long can this transition take? That depends on your list size and the delivery metrics you generate. Watch bounce logs, looking particularly at the big three domains -- AOL, Hotmail, and Yahoo -- and watch for temporary blocking errors due to throttling.
You should be able to maintain consistent high inbox delivery for all messages as you increase volume. If delivery numbers start to slide, slow down the volume again or hold steady for a campaign or two until the numbers begin to improve, then increase volume again.
The warm-up process requires hard work, careful segmentation, good list quality, and, above all, patience. But the reward is clear: high inbox delivery and a great sender reputation, which will ensure future inbox delivery for a long time.
Until next time, keep on deliverin'!
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