Cannot change sender address using smtp_header_checks

Question

Have postfix 2.10. Nondefault options in main.cf:

smtp_header_checks = pcre:/etc/postfix/smtp_header_checks
relayhost = smtp.company.org

/etc/postfix/smtp_header_checks :

/from:.*/i REPLACE From: somebody@yahoo.co.uk

However, tcpdump shows that the following line sent to the relay:

MAIL FROM:<root@myserver.localdomain>

I'm sending it with local sendmail

Check this http://serverfault.com/questions/724576/fully-altering-recipient-on-postfix/724890#724890 — ETL, Sep 25 '15 at 20:25
The address in `MAIL FROM` is envelope address, the address in `From:` header is header address. Which one did you want to rewrite? http://stackoverflow.com/questions/1750194/why-does-email-need-an-envelope-and-what-does-the-envelope-mean — masegaloeh, Sep 26 '15 at 04:02

Jacob Evans · Answer 1 · 2015-09-26T05:24:52.887

I like generic maps for this task, but besides that you can't send from yahoo this way.

postconf -e smtp_generic_maps=hash:/etc/postfix/generic
echo 'root icantsendfrom@yahoo.co.uk' >> /etc/postfix/generic
postmap /etc/postfix/generic
service postfix restart

to send from yahoo.

postconf -e relayhost=smtp.yahoo.co.uk:465 
echo 'smtp.yahoo.co.uk username:password' >>/etc/postfix/sasl_passwd
chown root:root /etc/postfix/sasl_passwd
chmod 600 /etc/postfix/sasl_passwd 
postmap hash:/etc/postfix/sasl_passwd

if postfix is installed, you are using it even if you run the sendmail command one one or the other can be installed, postfix will install a sendmail wrapper.

Cannot change sender address using smtp_header_checks

1 Answers1