Home / server / Questions / 839447
Accepted
Kreker
Asked: 2017-03-21 07:29:44 +0800 CST

Can't change sender address/domain in sendmail

  • 772

I have a server with sendmail and I need to send email througt PHP. I have an internal SMTP server on the same subnet, so I configured sendmail with FEATURE(nullclient', mail.server.local')dnl where mail.server.local is solved with an internal IP in /etc/hosts

There is no way that I can change the from address and domain. It's always [email protected].

Mar 20 16:18:48 nameoftheserver sm-mta[16402]: v2KFImVi016402: from=<[email protected]>, size=406, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]

The output of /etc/mail/sendmail.mc: 

      (short domain name) $w = nameoftheserver  
  (canonical domain name) $j = nameoftheserver.localdomain.local  
         (subdomain name) $m = localdomain.local  
              (node name) $k = nameoftheserver

How I can change this values?

sendmail

1 Answers

  1. Best Answer

    So, you are trying to change the envelope sender (as PHP's mail() function already handles the "From:" address) with Sendmail. That can be achieved by building a genericstable database to map the input sender address to the address desired.

    1. Create a text file /etc/mail/genericstable containing the mappings,

      www-data       [email protected]
root           [email protected]

      where the first value is the original username and the second value is the address desired. Or, if this doesn't work with your node server, the original sender address can also be in format

      [email protected]  [email protected]

    2. Create another file /etc/mail/generics-domains containing the domains, separated by newline. (Notice, that the file MUST include your server's canonical domain name.)

    3. Add the corresponding statements to /etc/mail/sendmail.mc:

      FEATURE(`genericstable',`hash -o /etc/mail/genericstable.db')dnl
GENERICS_DOMAIN_FILE(`/etc/mail/generics-domains')dnl

    4. Do the normal procedures after re-configuring Sendmail, e.g.

      cd /etc/mail
/usr/bin/make
/usr/bin/newaliases
systemctl restart sendmail.service
    • 6