I got a request today from someone on the software development team that reads as follows:
"According to RFC 4409 client mail submission to an email server is supposed to use port 587. Server to server SMTP relays are to use port 25. When I am not on site, I can't email via my work account via my iPhone or my residential internet because my ISP(s) filter port 25 to only allow traffic to and from their mail servers. They do however allow 587 anywhere per RFC 4409. Just to send this email I am having to relay off my own server in California. Can we please get the proper ports opened on the mail server? http://www.ietf.org/rfc/rfc4409.txt"; So my question now is I'm wondering if my Postfix server isn't properly configured? Right now it's listening on the following ports: [root@mail ~]# netstat --listen Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 localhost.localdomain:10024 *:* LISTEN tcp 0 0 localhost.localdomain:10025 *:* LISTEN tcp 0 0 *:cadview-3d *:* LISTEN tcp 0 0 *:sunrpc *:* LISTEN tcp 0 0 localhost.localdomain:60115 *:* LISTEN tcp 0 0 *:veritas_pbx *:* LISTEN tcp 0 0 localhost.loca:arbortext-lm *:* LISTEN tcp 0 0 *:bpcd *:* LISTEN tcp 0 0 *:smtp *:* LISTEN tcp 0 0 *:vnetd *:* LISTEN tcp 0 0 *:10022 *:* LISTEN tcp 0 0 *:imap *:* LISTEN tcp 0 0 *:http *:* LISTEN tcp 0 0 *:veritas_pbx *:* LISTEN tcp 0 0 *:https *:* LISTEN udp 0 0 *:sanity *:* udp 0 0 *:ldp *:* udp 0 0 *:sunrpc *:* udp 0 0 mail.iamghost.org:ntp *:* udp 0 0 localhost.localdomain:ntp *:* udp 0 0 *:ntp *:* udp 0 0 fe80::213:72ff:fe69:ntp *:* udp 0 0 localhost6.localdomain6:ntp *:* udp 0 0 *:ntp *:* Can anyone please tell me if I have misconfigured my Postfix mail server or if I can ignore this port? I've never had a request to have this port opened on the Firewall and actually it's open even on my Firewall but nothing's listening on it.
