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How to fix email error “User unknown in local recipient table”

In an ideal world, emails will work flawlessly and you never have to pull your hair out.

Unfortunately, we live in an imperfect world, where mails bounce with weird errors such as “User unknown in local recipient table“.

What is this table? How do I fix it? Out of all people in the world, why should I get this error?

Here we’ll see the answer for all these questions.

At Bobcares, we help website owners to fix these email bounce errors as part of our Outsourced Tech Support services for Web Hosts.

We’ve seen broadly 3 causes for the error “User unknown in local recipient table“.

Today we’ll discuss each of these causes and how we fix them.

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How to fix error “454 4.7.1 Relay access denied” in Postfix mail servers

How to fix error “454 4.7.1 Relay access denied” in Postfix mail servers

454 4.7.1 <user@domain.com>: Relay access denied

This is a commonly seen email failure error by web hosts, website owners and server owners who run Postfix mail server. 454 error usually happens while sending to and receiving from external domains.

In our role as Hosting Support Engineers for web hosting companies, we handle many such mail errors and fix them. Here, we’ll see what causes “454 4.7.1 Relay access denied” error and how we fix it. (more…)