README

If the constant MAILGUN_FROM_ADDRESSis set, this plugin will hardwire the from address to the value of MAILGUN_FROM_ADDRESS.

The WordPress Mailgun plugin set the address resolution order in this order:

1. From address given by headers - {@param $from_addr_header}
2. From address set in Mailgun settings
3. From MAILGUN_FROM_ADDRESS constant
4. From address constructed as wordpress@<your_site_domain>

So, if 1 or 2 above is true, the from address will not be set by the MAILGUN_FROM_ADDRESS constant

https://github.com/mailgun/wordpress-plugin/blob/9da7978246a3983159c8577c1ac09cedc075a2da/includes/mg-filter.php#L142-L148

This filter will override these and use the MAILGUN_FROM_ADDRESS constant.

The plugin will also hardwire the email from address and from name for Ninja Forms.

Installation

You know the drill.

Copyright and License

Hardwire Mailgun FROM address. is copyright 2021 Per Soderlind

Hardwire Mailgun FROM address. is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

Hardwire Mailgun FROM address. is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with the Extension. If not, see http://www.gnu.org/licenses/.