Okay, I've got something stumping me here on postfix setup on Ubuntu 8.04 LTS 64bit.

The gist of the problem: I can send email from my home system to it with SMTP, but I cannot retrieve messages via pop3.

When I telnet to port 110 from home, I get a connection refused. But when I telnet from the localhost to port 110, it goes through.

It's not a firewall issue. When the firewall is blocking that port, I can see the connection getting blocked in the log files, and disabling the firewall completely yields the same result.

My linode is setup as a subdomain of a domain hosted elsewhere. I don't think that could be related but ...

My best estimate is that there's something Ive got screwed up in the main.cf or master.cf file.

Here's my main.cf:
------------------------------------------------------
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no
append_dot_mydomain = no
readme_directory = no
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
myhostname = localhost
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = subdomain.domain.com, localhost, localhost.localdomain, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128,aa.bb.cc.dd # Home IP
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
virtual_alias_maps = hash:/etc/postfix/virtual
virtual_alias_domains = $virtual_alias_maps
---------------------------

master.cf is in it's virgin form. I'll post that if appropriate.

I've been on this more than a day with no progress.

Thanks in advance for any help anyone can offer.

Postfix doesn't do POP. Or IMAP. Or MAPI.

Postfix does SMTP.

Thank you very much! I've gotten past this problem with:

sudo apt-get install courier-pop
sudo apt-get install courier-imap

I've now got another issue with "Maildir invalid" when I check email but that's something for another thread.

Best to you...