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[1]] and modified them slightly for Fedora 14 / Amahi 6.

First of all, install postfix and remove sendmail:

   yum -y install postfix

   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:

   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:

   cd /etc/pki/tls/misc

   ./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:

   cd /etc/pki/tls

   mkdir gmail_relay

   cd gmail_relay

   openssl genrsa -out server.key 1024

   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.

   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.

 #### GMail SSL SMTP Relay
 relayhost = [smtp.gmail.com]:587

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

 #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:

   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

   /etc/init.d/postfix restart

Now try sending a mail, it should reach your gmail account.

See also:
Amahi_Mail_-_The_Free_Way, not working on F14, yet.
Forward_System_Emails
Enable_Outgoing_Mail, not working on F14, yet.
Monitor_System_Logs_via_E-mail