The blacklisting of the domain for email will affect trying to use SMTP via my server, but this is not an issue at the moment for me since I use Google SMTP. I had no idea the issue was so bad and I will look at what I can do moving forward. The Virtual Cloud host is 1and1 and I will contact them about setting up reverse DNS.
So we're left with the ports issue. Well, I have the Firewall extension loaded and everything set to open (and Apache mod-security turned off) trying to solve this issue. Are you suggesting that I should explicitly open up ports on top of this?
You asked for a copy of the Courier log. Below are the last lines.
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Nov 29 15:13:06 localhost spamd[11513]: spamd: connection from localhost.localdomain [127.0.0.1]:52122 to port 783, fd 5
Nov 29 15:13:06 localhost spamd[11512]: prefork: child states: II
Nov 29 15:13:07 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<ftuMBnJCQKx/AAAB>
Nov 29 15:13:07 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<JvaMBnJC0Jp/AAAB>
Nov 29 15:13:07 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<vvSNBnJClNF/AAAB>
Nov 29 15:13:07 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<dg2OBnJC7sd/AAAB>
Nov 29 15:18:09 localhost spamd[11513]: spamd: connection from localhost.localdomain [127.0.0.1]:52306 to port 783, fd 5
Nov 29 15:18:09 localhost spamd[11512]: prefork: child states: II
Nov 29 15:18:10 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<BI2hGHJC+Kx/AAAB>
Nov 29 15:18:10 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<DKahGHJCiJt/AAAB>
Nov 29 15:18:10 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<NqKiGHJCTNJ/AAAB>
Nov 29 15:18:10 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<SbyiGHJCpsh/AAAB>
Nov 29 15:23:12 localhost spamd[11513]: spamd: connection from localhost.localdomain [127.0.0.1]:52466 to port 783, fd 5
Nov 29 15:23:12 localhost spamd[11512]: prefork: child states: II
Nov 29 15:23:13 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<q42sKnJCmK1/AAAB>
Nov 29 15:23:13 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<mKmsKnJCKJx/AAAB>
Nov 29 15:23:13 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<76atKnJC7NJ/AAAB>
Nov 29 15:23:13 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<tL+tKnJCRsl/AAAB>
Nov 29 15:28:15 localhost spamd[11513]: spamd: connection from localhost.localdomain [127.0.0.1]:52708 to port 783, fd 5
Nov 29 15:28:15 localhost spamd[11512]: prefork: child states: II
Nov 29 15:28:15 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<T0S3PHJCiq5/AAAB>
Nov 29 15:28:15 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<mF63PHJCGp1/AAAB>
Nov 29 15:28:15 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<k124PHJC3tN/AAAB>
Nov 29 15:28:15 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<y3W4PHJCOMp/AAAB>
Nov 29 15:33:18 localhost spamd[11513]: spamd: connection from localhost.localdomain [127.0.0.1]:52930 to port 783, fd 5
Nov 29 15:33:18 localhost spamd[11512]: prefork: child states: II
Nov 29 15:33:18 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<owrCTnJCaK9/AAAB>
Nov 29 15:33:18 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<LCXCTnJC+J1/AAAB>
Nov 29 15:33:18 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<9h/DTnJCvNR/AAAB>
Nov 29 15:33:18 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<CTjDTnJCFst/AAAB>
Nov 29 15:38:20 localhost spamd[11513]: spamd: connection from localhost.localdomain [127.0.0.1]:53306 to port 783, fd 5
Nov 29 15:38:20 localhost spamd[11512]: prefork: child states: II
Nov 29 15:38:21 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<jdzMYHJC4LB/AAAB>
Nov 29 15:38:21 localhost dovecot: pop3-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<xPXMYHJCcJ9/AAAB>
Nov 29 15:38:21 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<3PHNYHJCNNZ/AAAB>
Nov 29 15:38:21 localhost dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, secured, session=<dwrOYHJCjsx/AAAB>