- "dnl" at the end of a command is optional, if there are no comments following it (it apparently means "delete from here to the start of the next line")
- The "FEATURE(`local_procmail',`/path/to/procmail')dnl" line must go before the existing "MAILER(`local')" line
- Be sure to restart sendmail after applying the change. (If not using Webmin to do the editing, also be sure to rebuilt the sendmail.m4 file.)
From the mailers documentation:
This is designed to be used in mailertables. For example, a common question is "how do I forward all mail for a given domain to a single person?". If you have this mailer defined, you could set up a mailertable reading:host.com procmail:/etc/procmailrcs/host.com
with the file /etc/procmailrcs/host.com reading::0 # forward mail for host.com ! -oi -f $1 firstname.lastname@example.org
This would arrange for (anything)@host.com to be sent to email@example.com. Within the procmail script, $1 is the name of the sender and $2 is the name of the recipient.
Of course there are other ways to solve this particular problem, e.g., a catch-all entry in a virtusertable.
- Invoking procmail from sendmail: this seems to be about how to forward mail to procmail on a shared server, rather than how to configure sendmail to filter all mail through procmail
- PROCMAIL_MAILER_PATH parameter
- FAQ: Version 8 issues seems to have some procmail examples