• 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.

Issue Unencrypted Connections SMTP Auth on Port 25

hschramm

hschramm

Basic Pleskian
Hi there,

with a fresh and clean plesk obsidian install it is possible to send e-mails as a client unencrypted. The AuthData it self is encrypted by DIGEST-MD5 but not the connection itself.
There is a deprecated option called smtpd_tls_auth_only. This option is now smtpd_enforce_tls = enforce but against RFC 2487. Disabling the auth on port 25 via plesk is not possible. So how do I prevent unencrypted connections from clients to port 25.

Kind regards,
Holger
 
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