454 4.7.1 error

  1. K

    Fixing the 454 4.7.1 Relay Access Denied Error in Postfix

    Postfix is a common mail server used by many web hosts, server owners, and users. Many of them report coming across the Relay access denied error, which looks like this: 454 4.7.1 <user@domain.com>: Relay access denied The 454 error usually surfaces when sending to or receiving from outside...