How to fix error starting mailman on cPanel server

The mailman error I got looks as below:

[email protected] [/usr/local/cpanel/3rdparty]# /usr/local/cpanel/scripts/restartsrv –wait –force mailman
Waiting for “mailman” to start ……info [restartsrv_mailman] systemd failed to start the service “mailman” (The “/usr/bin/systemctl restart mailman.service –no-ask-password” command (process 444759) reported error number 1 when it ended.):

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How to reset max defers limit on cPanel server

You may got:

2022-07-28 14:43:22 1oH9Pk-111Cld-8x ** [email protected] R=enforce_mail_permissions: Domain domain.com has exceeded the max defers and failures per hour (5/5 (100%)) allowed. Message discarded.

To reset:

/var/cpanel/email_send_limits/track/domain.com

If the limits too tiny on your server then adjust them per your needs:

sed -i -e 's/MAX_DEFER_FAIL_PERCENTAGE=.*/MAX_DEFER_FAIL_PERCENTAGE=125/g'
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How to create a file of specific size using Linux command line

Run for a second:

yes "some text" > testfile.txt

Reduce size:

truncate -s 50M testfile.txt

Create 50M file using fallocate command

fallocate -l 52428800 testfile.txt

To be more exact using inline arithmetic:

fallocate -l $((50*1024*1024)) > testfile.txt

Using head command

head -c 50MB /dev/urandom > testfile.txt
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