Relay mail to GMail with OpenBSD

Using Postfix

Install packages

pkg_add postfix-<ver>-sasl2

Setup mailer.conf

/usr/local/sbin/postfix-enable

Configure /etc/postfix/main.cf. Add the following …

relayhost = [smtp.gmail.com]:587
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_CAfile = /etc/postfix/cacert.pem
smtp_use_tls = yes

Put gmail login in /etc/postfix/sasl_passwd

[smtp.gmail.com]:587    user.name@gmail.com:password

Map sasl password

sudo chmod 400 /etc/postfix/sasl_passwd
sudo postmap /etc/postfix/sasl_passwd

Install a root certificate to /etc/postfix/cacert.pem

Start or reload postfix.

postfix start

Using smtpd

This does not work yet.

I have the same problem as this guy.

Reference

• http://ubuntu-tutorials.com/2008/11/11/relaying-postfix-smtp-via-smtpgmailcom/
• http://wiki.defcon.no/guides/opensmtpd
• opensmtpd.org
• opensmtpd with TLS authentication (in french)