I’ve just finished struggling through email setup on Ubuntu 14.04. TekSavvy apparently blocks port 25 outbound, except to their own mail servers. If you call and ask nicely, they will tell you it costs $4/month to unblock port 25 to the rest of the internet (you must pay for a Static IP in order to obtain unrestricted internet).

But there is an alternative!

Fortunately TekSavvy’s mail servers can be used to relay your outbound mail. This should be easy to set up, but I was plagued with a  530 Authentication required (in reply to MAIL FROM command) error when trying to use out.teksavvy.com:1025 (the server that was recommended to me).

The solution was to use smtp.teksavvy.com:25 – the SASL options are likely now unnecessary in my conf file, but since it works I’ve decided to leave things as-is.

In case it helps someone, here’s my Postfix configuration:

root@SERVER:/home/jordan# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
inet_interfaces = all
inet_protocols = ipv4
mailbox_size_limit = 0
mydestination = localhost
myhostname = SERVER
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relayhost = smtp.teksavvy.com:25
smtp_always_send_ehlo = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/saslpasswd
smtp_sasl_security_options =
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_use_tls = yes
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes