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>,
<mailto:mautic+unsubscribe_5e673e0c92032625872240@saturalanx.eu>,
<mailto:mautic+unsubscribe_5e673e0c8dbe3452889269@saturalanx.eu>,
<mailto:mautic+unsubscribe_5e673e0c8dbe3452889269@saturalanx.eu>,
<mailto:mautic+unsubscribe_5e673e0c8b66d508681083@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.