Issue Dovecot Digest-MD5 Problem

[sosbilisim]

Hi,

I have problems with dovecot's Digest-MD5 value I deleted in dovecot.conf and it after a while automatic change. Same issue have roundcube I changed 993 to 143 and 465 to 25 (ssl to tls) after a while automatic change.

How can I fix this?
thanks,