QUARANTINE_USE_SENDMAIL not working after update

[HierraStrunger]

After upgrade from 1.2.10 to 1.2.20 QUARANTINE_USE_SENDMAIL not respect true flag. Messages are sent as postmaster and broken DKIM. On status page these messages appers only one time, unlike before that appers two times. Any suggestion? I'm using postfix as server

[endelwar]

From 1.2.10 to 1.2.20 function quarantine_release (where QUARANTINE_USE_SENDMAIL is checked) hasn't changed functionality, the only edits are:

• convert long array syntax to short array syntax
• use Yoda style on if

Both of these changes have been done by the PHP-CS-Fixer tool

[HierraStrunger]

Any way to debug this? Outgoing messages are ok, incoming messages do not arrive in the email box.

[HierraStrunger]

After review sendmail symlink works