Cory Wright <[EMAIL PROTECTED]> writes:

>> Can you reverse verify against a qmail server?  I don't think you
>> can.
>
> By default, no.

That's too bad.  I'm sure djb had a good reason for going against the
grain on this matter though.

> If the qmail server has anything like the badrcptto patch applied
> then the recipient may be blocked at the SMTP level.

Most qmail sites probably don't have this patch applied.  Some large
ones like yahoo.com don't appear to (bummer).

aguirre:~/cvs/tmda/dist> telnet mx1.mail.yahoo.com smtp
Trying 64.157.4.82...
Connected to mx1.mail.yahoo.com.
Escape character is '^]'.
220 YSmtp mta435.mail.yahoo.com ESMTP service ready
ehlo foobar
250-mta435.mail.yahoo.com
250-8BITMIME
250-SIZE 10485760
250 PIPELINING
mail from:<[EMAIL PROTECTED]>
250 sender <[EMAIL PROTECTED]> ok
rcpt to:<[EMAIL PROTECTED]>
250 recipient <[EMAIL PROTECTED]> ok
quit
221 mta435.mail.yahoo.com
Connection closed by foreign host.

> But again this is getting away from TMDA.

It's ok to discuss this here.  It has some relevance to TMDA since a
feature like the one we are discussing in Postfix would ease TMDA's
life tremendously and would be a good candidate for a FAQ entry and/or
the general documentation.
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