Top Deliverability’s Blog
Postmark: Why most email providers have deliverability issues (and how we’re different)
Postmark just issued a new interesting blogpost:
There are three questions you can ask any email service provider to establish whether you’re going to have delivery issues: Do they take good care of their shared IPs? Do they use separate IPs for transactional and marketing email? Will their team proactively help you? With most providers, the answers will be no, no, and no—which means you will, in fact, run into a delivery issue sooner or later. 1. A lot of providers don’t take good care of their shared IPs (and try to upsell you dedicated ones) Most providers have reputation-based IP pools for different customers; you can imagine them as tiers going from ‘great’ to ‘average’ all the way down to ‘really bad’. Providers often start a customer on their best IP pool but downrank them as soon as something happens (for example, a spam event). This makes deliverability rates go down; and as the customer’s deliverability worsens, their ability
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