[Mimedefang] filter_recipient

[Harry Otten]

> You can tempfail each recipients for the secondary domain, BUT:
> Search the list, dfs often advices against this technique because of wrong
MTA implementations that try DATA even after all recipients has been failed,
sendmail > returns a permfail then.

Not a good option than. To bad sendmail can not be configured to temp fail
even if the continue sending the DATA block.

> You don't, MIMEDefang doesn't, Milter doesn't, sendmail 
> doesn't, the sendmail does, but doesn't tell anybody.
> Hence, you are stuck with the fact that:
> a) you tempfail the recipients and live the few bad MTAs, or
> b) accept all the mail and precess @Recipients in filter_begin.
> 

Okay, I will yust stick to B. 

> > When all the recipients are done the sending mail server issues the 
> > DATA instruction. At this point I want to do filtering.
> 
> Huh, you seid to NOT want to filter, but tempfail ;-)

I meant to tempfail or not ;-)

> 
> > Instead of end your email with a dot we might temp fail.
> 
> You cannot, once the DATA phase started, it MUST be finished 
> with dot; it will be failed afterwards.
> 
> ===
> 
> If you ask me, try variant a) above or drop the Backup MX 
> function. MTAs will retry themselves.
> 
> BTW#2: From your description stream_by_domain() seems to fit 
> better than *_recipient(). But won't matter at all, if you 
> use one of the both variants above.
> 
> Bye,
> 
> --
> Steffen Kaiser

Thanks for your feedback!

Cheers,
Harry