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How to check how many messages are there in the mail queue?

Updated January 10, 2019 03:24

Applicable to:

Plesk for Linux

Question

How to check how many messages are there in the mail queue?

Answer

Connect to the server using SSH
For Qmail use the following command:

# /var/qmail/bin/qmail-qstat
messages in queue: 58
messages in queue but not yet preprocessed: 1

There are 58 messages in queue. And one message was received for delivery via SMTP but haven't been processed and put in queue for delivery.
For Postfix either of the following commands may be used:

# mailq | grep Requests
-- 4 Kbytes in 2 Requests.

# postqueue -p | tail -n 1
-- 4 Kbytes in 2 Requests.

The above output means there are 2 messages in the queue.

Additional Information

How to manage mail queue on a Linux server with Plesk?

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