I have this problem long ago and I got it fix. But before that, I have 3 questions though. (1) Are you in sandbox mode? (2) If yes, have you tried to verify that email address that you are sending? (3) Have you changed your AWS access ID, secret access key and the ses endpoint?
@alkaka Which version of the Amazon SES plugin are you using? If it is the latest then there is a bug that stops the http code from being displayed in the event log.
@alkaka You can now just upgrade Common Plugin instead of editing the file I mentioned. On the Manage Plugins page use the package URL https://github.com/bramley/phplist-plugin-common/archive/master.zip
Multi-curl http code 0 result 220 email-smtp.amazonaws.com ESMTP SimpleEmailService-2762711029 IQzwmGhyTfJ3ceORwVFp 500 Error: command not implemented 500 Error: command not implemented 500 Error: command not implemented 500 Error: command not implemented 500 Error: command not implemented 500 Error: command not implemented 500 Error: command not implemented 500 Error: command not implemented 500 Error: command not implemented 500 Error: bad syntax 501 Input line length is too long! email alkaka2004@yahoo.com