mail_host patch

Fri Jun 6 13:33:01 UTC 2003

Vernon Schryver wrote:
>> From: Spike Ilacqua <>
>> ...
>> dccm currently uses the macro "{mail_host}" to get the value of
>> mail_host.  This works a lot of the time, but "{mail_host}" is
>> actually the host sendmail should send any bounces to.  If a smart
>> relay is defined ("DS" in the cf), then "{mail_host}" is always that
>> host.
>> This patch instead extracts mail_host from env_From.  It simply grabs
>> everything to the right of the '@' and strips any trailing '>'.  If
>> there is no '@', mail_host is left unset.
>> ...
> What happens if the envelope Mail_From value is not in the form
> or <> ?
> I think the patch covers the <> possibility, but what about source
> routes, the % kludge, ! paths, and who knows what else?
> Is there some other macro that contains the parsed
> sender host name?  Maybe $s ?
> Or is that how ${mail_host} gets changed from what the ops document
> says it should be?

On a whim I tried the $s macro in dccm.c

     static char mail_host_macro[] = "{mail_host}"     becomes
     static char mail_host_macro[] = "s"

Recompiled and installed dccm. This did not work with smart_host either -
however, now instead of listing the smart host , the mail_host is blank.

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