Configure postfix for 1 external ip to send email

[Roland Megens]

Followed this tutorial: http://www.howtoforge.com/virtual-us...ysql-centos5.1, and everything is working fine on my local network.
What I want to achieve: allow 1 external ip (at work) to send email to anywhere (recieving mails is no prob) with windows mail, i googled allot, but i can't figure it out, i think postfix is not allowing to do what i want

I quite a noob with linux

telnet 192.168.0.198 25 -> working, so i can locally telnet to server
(response: 220 server.bla.nl ESMTP Postfix)

telnet 12.34.45.67 25 -> NOT working, can't telnet from outside (external)
sending email, local network - working
sending email, external - not working (email client, server requires login activated)

No errors in mail.log
Sep 11 21:46:39 server pop3d: Connection, ip=[x.x.x.x]
Sep 11 21:46:39 server pop3d: LOGIN, user=bla@bla.nl, ip=[x.x.x.x], port=[55749]
Sep 11 21:46:39 server pop3d: LOGOUT, user=bla@bla.nl, ip=[x.x.x.x], port=[55749], top=0, retr=0, rcvd=12, sent=39, time=0

main.cf:
readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
myhostname = server.bla.nl
mynetworks = 127.0.0.0/8 192.168.0.0/24 12.34.56.79
#
#12.34.56.79 ip at work
#
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_mailbox_base = /home/vmail
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_use_tls = yes
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
virtual_create_maildirsize = yes
virtual_maildir_extended = yes
virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailbox_limit_maps.cf
virtual_mailbox_limit_override = yes
virtual_maildir_limit_message = "The user you are trying to reach is over quota."
virtual_overquota_bounce = yes
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
content_filter = amavis:[127.0.0.1]:10024
receive_override_options = no_address_mappings

[falko]

Please add the external IP to mynetworks in /etc/postfix/main.cf and restart Postfix.

[Roland Megens]

I already did, the external ip (example) of work: 12.34.56.79

mynetworks = 127.0.0.0/8 192.168.0.0/24 12.34.56.79


so the external ip where i want to send email from is already in mynetworks

from outside / external i can't telnet on port 25, from the local network telnet port 25 is working, something is blocking acces, for sure it is not firewall or router

configured postfix to listen also on port 2525, no response also

[falko]

Try 12.34.56.79/32

[Roland Megens]

changed:
mynetworks = 127.0.0.0/8 192.168.0.0/24 12.34.56.79

to:
mynetworks = 127.0.0.0/8 192.168.0.0/24 12.34.56.79/32

doesn't change anything, the help is very appreciated

[falko]

Does your ISP maybe block port 25?

[Roland Megens]

My provider blockes port 25 when you have a dynamic ip, I have a static ip and port 25 is should be open, tested it with different websites, all "test" sites say port 25 is open, can't figure out what is going on, locally everything works well.

Feel free to test:

server.humaheftruck.nl

ip: 88.159.160.114

followed a tutorial to change to port smtp 2525, and again, locally everything is fine, from external can't get in.

[falko]

I'm able to connect:

mh1:~# telnet server.humaheftruck.nl 25
Trying 88.159.160.114...
Connected to server.humaheftruck.nl.
Escape character is '^]'.
220 server.humaheftruck.nl ESMTP Postfix
ehlo localhost
250-server.humaheftruck.nl
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
quit
221 2.0.0 Bye
Connection closed by foreign host.
mh1:~#

[Roland Megens]

hmm, still not working from work, maybe provider work is blocking port 25, will try to figure that out

Thanks for the help so far.

[Roland Megens]

Spend a few hours figuring it out, isp of work blocks ALL trafic over port 25. Trying to setup postfix so it works on port 25 AND 587, no luck yet