• The BIND DNS server has already been deprecated and removed from Plesk for Windows.
    If a Plesk for Windows server is still using BIND, the upgrade to Plesk Obsidian 18.0.70 will be unavailable until the administrator switches the DNS server to Microsoft DNS. We strongly recommend transitioning to Microsoft DNS within the next 6 weeks, before the Plesk 18.0.70 release.
  • The Horde component is removed from Plesk Installer. We recommend switching to another webmail software supported in Plesk.

Prevent SMTP facilities for non-hosted domains

T

Tourex

Guest
I'm using Plesk Control Panel with Qmail on a centOS platform and provide hosting services for a number of small businesses.

How can I block or prevent users from sending email through their hosted mail account if they try to send mail from an address other than the domain hosted on our server, but using their hosted account details/account to log-in to the SMTP account. We had a case of a rogue employee who used his employers email account to send mailshots using an email address not associated with the client and/or our hosting services.

Thanks in anticipation.
 
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