Run webmail in php-fpm
Running webmail in php-fpm instead of fastcgi could bring up some more stability to the webmails and perfomance too.
Massimiliano Alessandri commented
I attempted following this procedure:
but I got an "Internal Server Error" so I had to restore "fastcgi" in place of "plesk-php73-fpm".
Having a look at /var/log/httpd/error_log file, I noticed a permission error on "/var/log/plesk-php73-fpm" folder, but I do not know if it could be related.
[Deleted User] commented
i would really suggest this to reduce the fastcgi stuff