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= Redmine Email Logging Using Local Mail Relay (Postfix) =

Use a local SMTP relay (Postfix) to send Redmine emails and enable logging both in '''log/mail.log''' (Redmine) and system logs (e.g., '''/var/log/maillog''').

==== Why Use an SMTP Relay for Redmine?====

Redmine does not retry sending emails if the SMTP server is unreachable at the time of notification. This behavior can lead to the loss of important email alerts (e.g., issue updates, password resets, notifications).

=== 1. Create a Local SMTP Relay Server on the Redmine Server ===

Set up a local Postfix relay server on the same server where Redmine is installed. This relay will securely forward all outgoing mail to your organization's SMTP provider.

Follow this guide to set up the relay:
* [http://rekallcm1/notes_wiki/index.php?title=CentOS_8.x_postfix_send_email_through_relay_or_smarthost_with_smtp_authentication Postfix Relay Setup Guide]

=== 2. Configure Redmine to Use Local Relay ===

Edit '''configuration.yml''' in your Redmine directory:
<pre>
# vim /opt/redmine/conf/configuration.yml
</pre>

Update the file to use localhost (Postfix):
<pre>
production:
  email_delivery:
    delivery_method: :smtp
    smtp_settings:
      address: "127.0.0.1"
      port: 25
      authentication: :none
      domain: 'gbb.co.in'
      enable_starttls_auto: false
      openssl_verify_mode: none
</pre>




==  Enable Email Logging in Redmine ==

Edit '''production.rb''' in your Redmine directory:
<pre>
# vi config/environments/production.rb
</pre>

Look for and comment out this line if present:
<pre>
# config.action_mailer.logger = nil
</pre>

Append or modify the following lines:
<pre>
config.action_mailer.logger = Logger.new(Rails.root.join('log', 'mail.log'))
config.action_mailer.logger.level = Logger::DEBUG
config.action_mailer.raise_delivery_errors = true
</pre>

This sets up a dedicated '''mail.log''' file in the '''redmine/log/''' directory with detailed logging enabled.

After saving your changes, restart your Redmine application:
<pre>
# systemctl restart httpd
</pre>

=== Monitor Logs ===

'''Redmine email log:'''
<pre>
# tail -f /opt/redmine/log/mail.log
</pre>

'''Postfix (relay server) mail log:'''
<pre>
# tail -f /var/log/maillog
</pre>


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