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First, let me start off by apologizing for being a beginner in managing a mail server. Because iredmail is too simple to set up, I managed to use it to install a mail server on a VPS. Webmail via Roundcube works very well, both sending an receiving works fine. However I was trying to send and receive mails via Bat, an email app for Windows. Receiving works fine. I just set up my server FQDN in the program, chose TLS and port 993.
However I'm unable to send mail via the program, via my server.
netstat showed that ports used by dovecot were: 4190, 993, 995, 110 and 143. I used "Regular Authentication". None of them allowed me to send mail. I'm sure I'm missing something fundamental here.
Port 25, TLS:
!12/06/2013, 12:41:23: SEND - TLS protocol error: Unexpected message SessionUnknownContentType ct (50).
A telnet to port 25 (hostname replaced by gnu.org):
#telnet apo.gnu.org 25
Trying 172.215.13.173...
Connected to apollo.gnu.org.
Escape character is '^]'.
220 apollo.gnu.org ESMTP Postfix (Debian/GNU)
421 4.4.2 apollo.gnu.org Error: timeout exceeded
Connection closed by foreign host.
Manual trying to send mail by telnet:
#telnet apo.gnu.org 25
Trying 172.245.33.173...
Connected to apo.gnu.org.
Escape character is '^]'.
220 apo.gnu.org ESMTP Postfix (Debian/GNU)
helo apo.gnu.org
250 apo.gnu.org
mail from:<kamel@drkamel.info>
250 2.1.0 Ok
rcpt to:<kamel@who.in>
553 5.7.1 <kamel@who.in>: Sender address rejected: not logged in