How to prevent sendmail from sending mailer-daemon notifications

Question

I am under a mailer daemon redirect spam attack. Please help

In case of inexistent user, my sendmail answers to fake senders and it gets blacklisted for spam relaying.

How to disable mailer daemon ? how to stop it ?

Comments

en anglais il y a plus de chances ...

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on vous l'a changé 2 fois mais vous remettez votre ancien sendmail.mc avec votre programme du XXe siècle qui vous ramène aux valeurs par défaut. On n'y peut rien ...

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et voilou in english

Answer 1

To prevent your mailer-deamon from sending emails, just copy paste  :

define(`confERROR_MODE',`q')dnl

in your /etc/mail/sendmail.mc and run sendmailconfig.

If you call sendmail from the command line, add the option

sendmail ... -OErrorMode=q

If you use a software that generates its own sendmail.mc, try to add the define above in the templates ( if any ) or ask the author.