Category Archives: Postfix

How to correct 554 5.7.1 : Relay access denied email errors, and prevent them in the future

Posted on: October 11, 2016

Relay Accessed Denied is a common email error.   It means that the server is not allowing an email to be sent to another mail server.  The most common causes of this error are: The sender did not authenticate to the outgoing mail server The recipients server has determined the senders server to be a …

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Some common postfix commands

Posted on: August 11, 2015

Here are a few of my most used postfix commands for managing the mail queue.   Check how many emails are in the queue per domain (based on from address) postqueue -p | grep “Aug” | awk ‘{print $7}’ | sed ‘s/^.*@//’ | sort | uniq -c | sort -n List all the email from …

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