>> I need a solution to accept all mail from @yahoo.com ONLY from yahoo
>> MTA's. Any ideas ?
PH> 1. Be brave and become a tester for Exim 4 (see my posting of last Monday).
PH> This will take a little time, and you may find some bugs.
I apply too many patches (specific of our free e-mail service) to
current 3.33. Like reject after mail from: if callback to originator
domain failed (headers_fixup hook drooped completely with this path),
split of max_rcptto for !local_domains and for local_domains, customized error
messages, pause 5 sec after rcpt to: if return_code match ^[45].. and
maybe something else.
It will be very good if you implement these features in next version,
but, I understand: nude enthusiasm wanna to eat some kind of food,
not words like "thanks" or "you're best".
But i'm in progress reading manual of 3.95
PH> 2. Then at the start of the Exim 4 configuration, write
PH> hostlist yahoo_mtas = <list of yahoo mta IP addresses>
PH> 3. Then in the ACL you can write
PH> deny message = yahoo senders must come from yahoo hosts
PH> condition = ${if eq ${domain:$sender_address}{yahoo.com}{yes}{no}}
PH> hosts = !+yahoo_mtas
PH> However, this is sure to cause you trouble. Consider these:
PH> 1. What about mail from your backup MTAs? Solved by including them in
PH> the list, so you have
PH> hosts = !+yahoo_mtas : !+backup_mtas
PH> 2. What about this case:
PH> . A message from x@??? is sent to somebody at some other
PH> installation.
PH> . The somebody has forwarded her mail to your site.
PH> . You bounce the message...
PH> There's no solution to that.
Yeah, I know :((
First and last trouble - forwarding.
Stupid yahoo, why not reject RCPT To: at the begin of smtp
session for unavailable mailboxes ? DATA not accepted - too late :((
PH> -----------------
PH> This message has the distinction of being the first bit of Exim 4 advice
PH> I've posted.
Yeah, Philip, your MTA simply the BEST choice from free MTA's. Postfix
is too (simply russian word... how to translate....? ah! ) hard in
configuration, while exim is very flexibl, and of course, sendmail is not for
over 200k messages/day - especialy for situation like spam wave with
forged mail from:, that point to your domain...
Good work, thank you.
