Deliverability Dilemmas Solved: How to Prepare for an IP Address Switch
Next, segment your subscribers by recency and activity. Send messages to approximately 10,000 of your most recently responsive and active subscribers per ISP. The trick here is to try to minimize your complaint rates and show a very engaged subscriber base to keep the process as short as possible. Then analyze and correct any deliverability issues you glean from your monitoring tools and bounce logs. If there are no issues (or after you’ve resolved them), double your volume for the next send and repeat. You should be able to send your full volume in as little as two weeks as long as things like your complaint rate are at acceptable levels.
5. Cross the finish line. Continue monitoring your reputation at SenderScore.org, TrustedSource.org and SenderBase.org during this process as well. Once your reputation looks good and you're sending full volume, remove the old IPs from your authentication records and feedback loops — and breathe a sigh of relief.