Postfix relayhost SMTPs / SASL with rackspace smtp.emailsrvr.com

Having run into the problem myself, how to setup postfix with rackspace as the relayhost, running over SMTPs I thought I’d share the solution. I’ve seen a bunch of forums where this question has been asked but not been answered.

Start by creating the user that should be used for relay, don’t forget to set it’s permission in the rackspace control panel to allow for SMTP (SSL) login.

1. /etc/postfix/main.cf

This shows what config is unique to rackspace, setup the rest as you prefer.

relayhost = [smtp.emailsrvr.com]:587

smtp_sasl_auth_enable = yes

smtp_sasl_password_maps = hash:/etc/postfix/sasl_pass

smtp_sasl_security_options = noanonymous

smtp_use_tls = yes

2. /etc/postfix/sasl_pass

[smtp.emailsrvr.com]:587          account@domain.com:mypassword

chmod 640 /etc/postfix/sasl_pass

postmap hash:/etc/postfix/sasl_pass

3. Restart postfix / done

service postfix restart