SymptomsMail does not work on the server. It is not possible to establish a connection to port 25.
C:\Users\Administrator>telnet localhost 25
530 mail.domain.tld ESMTP MailEnable Service, Version: 0-5.10- denied access at 06
Connection to host lost.
I have ensured that all MailEnable services are up and running.
Cause & ResolutionRefer to this MailEnable article for the cause and resolution:
ME020417 - TRB: SMTP 530 error - denied access