A lot of emails in List-Unsubscribe

Your software
My Mautic version is: 2.15.1
My PHP version is: 7.3.14-1~deb10u1

Your problem
In each email sent by my Mautic instance there is a huge list of List-Unsubscribe emails. Something like:

List-Unsubscribe: <mailto:mautic+unsubscribe_5e673e0c92032625872240@saturalanx.eu>,

and it goes on and on for thousands of lines. This makes no sense to me, and I believe it makes my emails quite more heavy than they deserve to be.

How can I get rid of this long list? I can’t see why an email should carry more than one List-Unsubscribe address, considering that that address already encodes that specific email.

1 Like