Port 25 open / Postfix installed, but no mail being sent out

I've installed Postfix, opened port 25 (as well as ports 110, 995, 143, and 993) on my local computer connected to the Internet, but none of the e-mails that I am attempting to send out using the localhost:25 definition are being properly routed to their destination. Basically, I am trying to set up a local SMTP server to send out e-mails from my production website's software (also hosted on the same local computer).

I am using Verizon FIOS Internet service, who reportedly blocks port 25 (but actually does not in my case, as I have enabled it and checked that is in fact accessible from my external IP address). I have attempted to send the e-mail using no Smart Host, then using Verizon's SMTP server as a Smar开发者_开发问答t Host, and finally using Verizon/Yahoo's SMTP server as a Smart Host, but none of them have worked.

What could be causing this issue?

I really appreciate any help on this problem, because I've been working to no success on it for the past three hours. Thank you all in advance!

absolutely, it's very common for large ISPs to block outbound connections on port 25 ~ they do this specifically to prevent what you are attempting. You should give them a call and verify if this is the case.

OR

See if you can configure your postfix to authenticate on your verizon mail account and relay your mail through that. [actually I did exactly this ~ I'll see if I can dig up the config]

-sean

UPDATE

here we go:

relayhost = [smtp.gmail.com]:587
smtpd_sasl_auth_enable = no
smtp_sasl_security_options =
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

Sorry, I'm a little crunched on time, you'll have to dig up the docs for postfix relaying and how to setup the password maps [cause I don't recall offhand]

Hope his helps...

Have you setup MX record in DNS (reverse DNS must work properly) and the respective domain name (FDQN) in the smpt demon ?