Mails are not received

[openletter]

There are many threads on problems using AWS. Here is a recent one:

Gmail hates me now

Hi all, first post. Trying mail-in-a-box and trying to get it to work. I’ve followed the docs as carefully as I could. All worked great for about a week and then emails to gmail not only don’t go to gmail spam, they get bounced back. Now this is happening to lots of sent mails to all other domains I send to. Basically I can’t send email to anyone. Lots of “Connection timed out”. Seems I’m receiving ok. But this worked great for a week. My setup is on AWS (Amazon web services). Stock standard…