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We're using mutt to send out a daily email through cron. The only problem is that half the people aren't getting it, because its getting rejected as coming from an invalid address. Right now its sending out as email@example.com.
How can I change this? I found the sendmail.cf, which I believe previous people have been editing directly, which from what I read isn't the best way to configure sendmail.
Also, this is the first time i've actually tried to do anything with sendmail, so sorry if this is a real basic question.
I tried to do what you said but it errors on the export line, saying "export: command not found". when i look in my /etc/passwd my account is set to /bin/tcsh if that might be the problem.
Also, using your solution once i get past that export error, do i need to modify the sendmail.cf? I think people have been directly modifying the .cf file rather than .mc so i'm afraid to regenerate the .cf.
Oops, export is used for the bash shell. In your case I guess you need setenv
setenv EMAIL firstname.lastname@example.org
You don't modify sendmail.cf directly. You modify sendmail.mc and based on that you rebuild sendmail.cf.
It would be better use masquerade, but since you don't want to, then go with the EMAIL workaround