Re:Mail in a Box
by throwanem on Monday November 25, 2019 @04:02PM
(#21632788)
Use https://mxtoolbox.com/blacklists.aspx or something like it to verify that you have a clean VPS IP before putting any effort into setting it up as a mail host.
Use https://www.mail-tester.com/ or something like it to check how completely you're set up to maintain a good sender reputation. Having one doesn't guarantee you'll be able to deliver to places like Gmail, but not having one does guarantee that you won't, so keep fixing things until you get a 10/10 score. (The tool will tell you what it doesn't like, so this is easier than it might sound at first.)
Use https://www.mail-tester.com/ or something like it to check how completely you're set up to maintain a good sender reputation. Having one doesn't guarantee you'll be able to deliver to places like Gmail, but not having one does guarantee that you won't, so keep fixing things until you get a 10/10 score. (The tool will tell you what it doesn't like, so this is easier than it might sound at first.)