hi,
we have the following issue:
Two Users on our Plesk-Server were banned/blocked several times a day by sending/reveiving emails. in the maillog i found the following entry:
Dec 19 08:56:00 srv1 postfix/smtpd[2624657]: warning: pdxxxx8a3.dip0.t-ipconnect.de[xxx.xxx.xx.xxx]: SASL PLAIN...