Postfix Relay with mynetworks -- not working

@CricketAlley:

I'm trying to setup postfix to allow relaying from two specific IP addresses – office and home.

It works with the first IP address (office), but not from home. I'm stumped.

I have this set:

mynetworks = 127.0.0.0/8 24.12.24.23 24.12.22.17

The IP in green works just fine. It is my office. The one in red doesn't work.

Can anyone help me with what I might be missing?

What error message do you get in /var/log/mail.log or wherever you are logging mail?

Also, post the output of postconf -n.

Thank you for your help.

The error I'm getting now on my laptop at home is: "Can not connect to SMTP server."

I can take this same laptop, without changing anything, and it works fine at the office.

There isn't a record in the mail log because it isn't connecting. I'm stumped on that.

Here is the postconf - n.

Thanks much.

alias_maps = hash:/etc/aliases

config_directory = /etc/postfix

debugpeerlevel = 2

defaultdestinationconcurrency_limit = 5

defaultdestinationrecipient_limit = 10

home_mailbox = Maildir/

html_directory = no

mailboxsizelimit = 256000000

mailq_path = /usr/bin/mailq.postfix

manpage_directory = /usr/share/man

maximalqueuelifetime = 2d

mydestination = hash:/etc/postfix/mydomains

mynetworks = 127.0.0.0/8 24.12.24.23 24.12.22.17

newaliases_path = /usr/bin/newaliases.postfix

queuerundelay = 10000s

readmedirectory = /usr/share/doc/postfix-2.3.3/READMEFILES

sample_directory = /usr/share/doc/postfix-2.3.3/samples

sendmail_path = /usr/sbin/sendmail.postfix

setgid_group = postdrop

smtpsaslsecurity_options = noplaintext

smtpdbanner = $myhostname ESMTP $mailname

smtpdrecipientrestrictions = permitmynetworks, permitsaslauthenticated, rejectunauthpipelining, rejectinvalidhostname, rejectnonfqdnsender, rejectunknownsenderdomain, rejectunauthdestination, rejectunknownrecipientdomain, rejectnonfqdn_recipient

smtpdsaslauth_enable = yes

smtpdsasllocal_domain = $myhostname

smtpd_timeout = 5

unknownlocalrecipientrejectcode = 550

virtualaliasmaps = hash:/etc/postfix/virtual

@CricketAlley:

Thank you for your help.

The error I'm getting now on my laptop at home is: "Can not connect to SMTP server."

I can take this same laptop, without changing anything, and it works fine at the office.

Is your home ISP blocking SMTP traffic? A large number do, these days, to stop spam (use their relay or else). Does your linode have a firewall so only specific IP addresses can connect?

From your laptop at home, what is the result of "telnet your-inode 25" ? What about "telnet your-inode 587" ? It's possible you could run an authenticating SMTP server on the SMTP-submission port (587) if your ISP is blocking port 25.

Hey, thanks much!

It was so easy. :D

I just tested port 25, and yes, it is being blocked by my ISP.

So, I just changed postfix to another port for SMTP and viola….. workslike a charm.

Thank you much.