I am building an app that incorporates Postmark App's Incoming Email capability to keep a threaded list of replies to an email. Their documentation suggests adding the post ID to the reply-to address - for example reply+POSTID@domain.com
. However, when I attempt to use this method with cPanel, the emails are bounced back.
I have reply@domain.com
set up, without adding the post ID the email is forwarded to the Postmark App inbox address, adding the ID breaks it. Is there any way to do this in a WHM/cPanel environment? It is a VPS account so I have full access if there is another way to tackle this.