Configuring sendmail to redirect all e-mail to a single user

emailsendmail

I am installing Bugzilla and I want to prevent it from sending out e-mails, which instead should be sent to a user on the local machine.

I have this line in my /etc/mail/sendmail.mc:

FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')

I added the following line to the top of /etc/mail/virtusertable (the rest is comments):

@mydomain.com     myusername

I then ran the following comands:

$ makemap hash /etc/mail/virtusertable < /etc/mail/virtusertable
$ m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

I then restarted the sendmail server. However, when I send an e-mail to myusername@mydomain.com via the mail command, I still receive it in my web-based inbox, which is not what I want. I want it to be delievered only to myusername on the local machine.

Best Answer

Please do yourself, and the world, a favour and replace Sendmail with something easier to configure and maintain, like Exim or Postfix. I would normally vote down answers that said "use a different product", but in the case of Sendmail, I think it's worth the risk. Sendmail is very complex to configure compared to modern MTAs and should only be used if you have an existing complex Sendmail infrastructure and you have considerable Sendmail experience.

Also, I don't know if it's a typo or not, but you have

m4 /etc/mail/sendmail.mc > /etc/mail/endmail.cf

Notice the endmail.cf, rather than sendmail.cf.

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I believe that you need to change the hosts file to state:

127.0.0.1    localhost
127.0.0.1    doron-desktop

The 127.0.1.1 was introduced with Ubuntu Edgy. But some applications look for the host name to match 127.0.1.1. Sendmail is one such application. You can keep the 127.0.1.1 if you want to stick with the new standard but be sure to add 127.0.0.1 doron-desktop.

Also note the following in your error log:

ruleset=check_rcpt

After which you are told that your doron-desktop domain doesn't exist. There are different files that will allow you to set your domain name. Try setting the domain name in the following areas:

/etc/hosts
/etc/resolv.conf
sendmail conf files

You definitely need to convince sendmail that you have a domainname and that it's FQDN (even though it's not). If you have a domain name registered use (in your hosts file):

doron-desktop.somedomain.com

The server won't care that public dns doesn't point to your desktop computer. That being said, email server that you send email too might (or will) care that your desktop server is sending email on behalf of whatever domain name you put in the hosts file and may either block the emails, return them, or blacklist them (blacklisting won't happen if your just testing - you'll need to send out thousands of tests).

Nginx – configuring sendmail sender address

I think typically people use the "-f" parameter for example:

sendmail -f me@mydomain.com

Best Answer

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