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Send all outgoing mail to /dev/null

Prevent mail being marked as spam

Change default from address from Postfix from www-data to something else

How to send email with my CentOS server?

Get log of mail sent with mail() from PHP (sendmail?)

How do I permanently delete e-mail messages in the sendmail queue and keep them from coming back?

"My unqualified host name (foo.bar) unknown" Problem

Unattended upgrades won’t use mailx when run by Systemd

How to send raw mail message on Linux?

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