Yesterday we updated the core from 22.214.171.1248 to 126.96.36.199 now we have the following issue when we reply a mail. (tried with webapp versions webapp-188.8.131.527 & webapp-184.108.40.2064)
In webapp the to mail adress shows the normal format email@example.com in postfix we are getting the following to header to==?utf-8?Q?=EF=BB=BFuserfirstname.lastname@example.org,
If we delete the original to mailaddress in webapp and put the same mailaddress. Then the e-mail goes out as normal.
New mail and reply on mails that we received after the update runs without any issues.