- Plesk for Linux
How to prevent POP and SMTP clear text logins according to PCI compliance?
Note: if you don't have root access to Plesk server via SSH, contact your hosting provider regarding the issue
1. Login to the server over SSH
string in the following line at
POP3AUTH="CRAM-MD5 CRAM-SHA1 CRAM-SHA256"
3. Add the following line to
/etc/postfix/main.cf Postfix configuration file :
4. Restart the services to apply the changes:
# service postfix restart && service courier-imapd restart
Note: If Qmail is used, this is recommended to switch to Postfix. Forcing secure connection over SMTP in Qmail requires patching. Qmail entered extended support .