Outgoing mail via gmail

Send mail through your HDA using your gmail account

Warning: Only try this if you know what you’re doing.

I took the information from this page http://carlton.oriley.net/blog/?p=31 and modified them slightly for Fedora 14 / Amahi 6.

First of all, install postfix and remove sendmail:

1. yum -y install postfix
   
2. yum -y remove sendmail
   

Openssl and openssl-perl are needed to generate certificates and create SSL connections to GMail
Openssl should be installed already, but to be sure:

1. yum -y install openssl openssl-perl
   

A Certificate Authority is needed to create the necessary certificates. You can skip the next paragraph if you already have one:

1. cd /etc/pki/tls/misc
   
2. ./CA.pl –newca
   

• You will be prompted for the file name, hit enter to create a new CA.
• You will need to enter a passphrase next, be sure to remember it.
• Choose the Country Name, State or Province Name, Locality Name, Organization Name, and Organizational Unit Name to your liking. Be sure to remember the values, they will be needed in the key creation later.
• For the Common Name, type “CA” (without quotes).
• Take defaults for everything else and when prompted enter the passphrase from above.
  

Now a key that is sent to GMail to start the SSL encryption will be created: 

1. cd /etc/pki/tls
   
2. mkdir gmail_relay
   
3. cd gmail_relay
   
4. openssl genrsa -out server.key 1024
   
5. openssl req -new -key server.key -out server.csr
   

You will be prompted for country etc. like when creating the CA. Enter the same values.
As Common Name, now enter the name of your server, FQDN or not, your choice.

1. openssl ca -out server.pem -infiles server.csr
   

You will need to enter your passphrase again at this point.
When asked if you want to sign the key, answer yes, same when asked if to commit it.

Add the following to the bottom of the file /etc/postfix/main.cf. You do not need to change anything else in it, as the last setting for any option is the one that is saved.

1. 1. 1. 1. GMail SSL SMTP Relay

relayhost = [smtp.gmail.com]:587

1. auth

smtp_sasl_auth_enable=yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

1. tls

smtp_use_tls = yes smtp_sasl_security_options = noanonymous

smtp_sasl_tls_security_options = noanonymous

smtp_tls_note_starttls_offer = yes tls_random_source = dev:/dev/urandom smtp_tls_scert_verifydepth = 5 smtp_tls_key_file=/etc/pki/tls/gmail_relay/server.key smtp_tls_cert_file=/etc/pki/tls/gmail_relay/server.pem smtpd_tls_ask_ccert = yes smtpd_tls_req_ccert =no smtp_tls_enforce_peername = no Create /etc/postfix/sasl_passwd file with your GMail login credentials that looks like below:

gmail-smtp.l.google.com user@gmail.com:password
smtp.gmail.com user@gmail.com:password

Obviously, you need to change ‘’user’’ to your username and ‘’password’’ to your gmail password.

Create the password database:

1. postmap hash:/etc/postfix/sasl_passwd

   Protect the files with your GMail login data:

   # chmod 600 /etc/postfix/sasl_passwd
   # chmod 600 /etc/postfix/sasl_passwd.db
   # chown postfix /etc/postfix/sasl_passwd
   # chown postfix /etc/postfix/sasl_passwd.db
   Restart Postfix and enjoy having your email from your server sent through your GMail account:

   # /etc/init.d/postfix restart