> > It would not surprise me at all to discover that this is part of
> > the source of the symptoms I've seen. But note that it still
> > requires that the -initial- MTA failed to provide a Message-Id:
>
> It is impossible to determine the "initial MTA". Qmail will only add
> Message-Id fields to locally injected e-mail, not relayed email. If it is
> relayed e-mail, it may be the "initial MTA" or it may not, you just don't
> know. Would you consider any SMTP sender a MTA?
Of course not, the initiating MUA is quite likely to use SMTP.
BUT if the MTA doesn't find any Received: headers, it should
assume that it is the first MTA to handle the message.
> > so, this would imply that qmail is not a compliant MTA. (Although,
> > I can see the argument about that only being the responsibility
> > of the first MTA to process the message; a counter-argument could
> > be made that qmail should reject such messages.)
>
> Again, anthing about the "initial MTA" doesn't mean anything. Most MTAs
> add Message-Ids to any handled message, if it doesn't have one.
'Initial MTA' -DOES- mean something. But since the Message-Id
header is optional, it's a moot point.
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