Yesterday, I looked at the analysis of ESP delivery done by Mr. Geake. Today we’ll look at some of his conclusions. “Being blacklisted most likely suggests that sender IP either sends out to a great deal of unknown or angry recipients.” That’s not how most blocklists work. Most blocklists are driven by spam traps or by the personal mailboxes of the list maintainers. The...
One of my mailing lists was asking questions today about an increase in invitation mailings from Spotify. I’d heard about them recently, so I started digging through my mailbox to see if I’d received one of these invites. I hadn’t, but it clued me into a blog post from early this year that I hadn’t seen before. Research: ESPs might get you blacklisted. That article is full...
There are a number of sites online that provide public information about reputation of an IP address or domain name. Sender Score – . Provided by Return Path. They collect data from some ISPs and blocklists. Using a proprietary formula, they calculate a sender score running from 1 – 100 for each IP address sending mail to their network. Higher scores means a better reputation. Can be...
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