Dovecot defunct processes

[Jose Luis Hime]

Dear subscribers:

I have been seeing a lot of defunct processes from dovecot, like listed
below.
Is this a regular behaviour or can this be a problem?

Regards,
J. Hime

USER    PID  %CPU %MEM   VSZ  RSS  STAT START  TIME COMMAND
dovecot 5465  0.0  0.0     0    0  Z    18:17  0:00 [pop3-login] <defunct>
dovecot 5466  0.0  0.1  3896 1464  S    18:17  0:00 pop3-login
root    5478  0.0  0.0     0    0  Z    18:17  0:00 [dovecot-auth] <defunct>
dovecot 5479  0.0  0.1  3896 1464  S    18:17  0:00 pop3-login