How to enable SMTP without SSL on port 25 in iRedMail / Postfix

To allow the sending of messages on the mail server without encryption via port 25, you need to open the Postfix configuration file, for example, in the nano editor (in which Ctrl+X to exit, y/n to save or cancel changes): And uncomment two lines: And leave the commented line: Reload Postfix to apply the changes: […]

How to fix error “host NAME greeted me with my own hostname NAME”

I noticed once on one server that Postfix does not always send mail, the logs had the following error: warning: host NAME[]:25 greeted me with my own hostname NAME After seeing the host name: Found that it is not correct and coincides with that on which the mail is sent! Changed the host name to […]