In message <Pine.LNX.email@example.com
k>, you wrote:
>Dear HotMail postmasters,
>Cranfield hosts a mailing list of MBA students, and a number of
>these have their mail forwarded to hotmail.com addresses. A recent
>posting to the list produced the bounce below, which is a bit surprising.
>Do you have a limit on the number of RCPTs in a single transaction?
>(According to SMTP standards you should accept at least 100).
I may be mistaken, but I believe that number is just a suggestion, and
nor a requirement.
>But if that
>limit is less than 10 how do are managers of medium/large email discussion
>lists supposed to cope?
Ideally, if their limit is set to 10, then they should give 4xx SMTP response
codes after the first 10 RCPT TOs (not 5xx responses) and then your MTA
should be smart enough to send the message to just 10 Hotmail recipients
at a time.
If your MTA isn't smart enough to do that, then I believe that it qualifies
as being "broken".
Note however that Hotmail was giving you 5xx (permanent) failure responses,
not 4xx (temporary) failure responses, so the real problem would indeed
seem to be on their end.
>Or is this just a temporary failure, and not the consequence of a poorly
>designed anti-spam mechanism?
I read something just the other day on some (Internet) industry news site
that said that Hotmail has been having some "technical difficulties" lately.
The problem you experienced may perhaps be related to that in some way.
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