This error message is also seen due to improper configuration settings of Postfix, such as relaying and recipient settings.If the mail is attempted to send to an external mail server without proper authentication, the sending mail server will reject the mail with the error “454 4.7.1 Relay access denied”.But most mail server require the mail account has to authenticate itself correctly, inorder to connect to it to send mails.Įrror 454 is shown in the email logs and bounce message to users, usually when they send, forward or receive mails in Postfix mail servers.
The recipient can be within the same mail server or in any external mail server. The mail client connects to the sender’s mail server and attempts to deliver the mail to the recipient. In mail delivery process, a mail client such as Outlook, Squirrelmail, etc.
See how we help web hosting companies What causes “454 4.7.1 Relay access denied” in Postfix servers Here, we’ll see what causes “ 454 4.7.1 Relay access denied” error and how we fix it. In our role as Support Engineers for web hosting companies, we handle many such mail errors and fix them. 454 error usually happens while sending to and receiving from external domains. This is a commonly seen email failure error by web hosts, website owners and server owners who run Postfix mail server.
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