I've recently signed up to SMTP2GO (smtpcorp). I've setup postfix on one of EC2 servers and have pointed it to my smtp2go account:
relayhost = [smtpcorp.com]:2525
Now all my mail is being routed through SMTP2GO, but the issue is, that the 1000+ emails that are generated by cron job ect are being sent to SMTP2GO using the email address:
root@ec2-46-51-151-256.eu-west-1.compute.amazonaws.com
My question is, what would be the best way to stop all these "local" emails being routed to SMTP2GO?
Thanks
Martin
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 = ec2-46-51-151-256.eu-west-1.compute.amazonaws.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = ec2-46-51-151-256.eu-west-1.compute.amazonaws.com, localhost.eu-west-1.compute.internal, localhost
relayhost = [smtpcorp.com]:2525
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = static:account:password
smtp_sasl_security_options = noanonymous
smtp_tls_security_level = may
header_size_limit = 4096000
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = ipv4
Best Answer
Postfix relayhost doesn't send local mail to the relayhost normally:
From postfix.org:
relayhost (default: empty)
So if it is happenning, it is because your local mail is not identified as local. You need to include your local domain in
mydestination =
config line. I see you have the ec2-....amazonaws.com there but probably you have defined a local domain different than this one for your LAN. If you don't have defined a local domain, I think (needs testing) if you only add127.0.0.1 localhost.localdomain localhost
in youretc/hosts
file and addlocalhost.localdomain
tomydestination=
it should be sufficient.