Incoming mail stuck in Hold directory

[Budi F]

Hi,

I'm trying to install mailscanner in centos 7 with postfix

It's working fine, but at least in every 3,4 hours all the email stuck in
incoming directory,
/var/spool/postfix/hold

Restarting the mailscanner will solved the problem, all emails in hold
directory fill be delivered, but then this will happen again

Temporary, with cron, I restart the mailscanner service in every 2 hours

My configuration:
Centos 7
postfix-2.10.1-9.el7.x86_64
MailWatch Version: 1.2.15
spamassassin-3.4.0-5.el7_7.x86_64
clamd-0.102.3-1.el7.x86_64

drwxrwx---. 2 postfix mtagroup    6 Aug  1 11:02 hold

And the files under hold directory are own by postfix.postfix

Member of mtagroup
postfix mail clamscan apache

Why is sometime the emails stuck in the hold directory, and what are the
solutions?

Regards
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