----- Original Message -----
From: Max Paperno <[EMAIL PROTECTED]>
To: inFusion Support List <[EMAIL PROTECTED]>
Sent: Sunday, June 25, 2000 11:45 PM
Subject: Re: [iMS] It works! & 2 POST questions
> At 6/25/2000 11:05 PM -0400, Howie Hamlin wrote:
>
> >================================================
> >The BadMes folder is for storing the raw mail message if there is a
problem
> >with the control file.
> >================================================
>
> OK. So, is there any way to recover mail from NULL that can't be
delivered? If not, please consider this a feature request :)
>
The POST Server will return undeliverable mail to the sender as follows:
If SMTPFROM is not NULL then send return mail to SMTPFROM address
else if FAILTO is not NULL then send return mail to FAILTO address
else don't send return mail
Like I said, the BadMes folder is for mail that has a bad control file.
>
> >================================================
> >The MX Lookups are done via UDP. I'll look into have an option to use
TCP
> >instead. For now you should make sure that you have MX caching enabled
> >which is better that using lookups continually to the DNS servers.
>
> I guess I don't know why UDP vs TCP would matter, but if you can improve
it, sounds good.
UDP is fast but not guaranteed reliable. On a lan this does not really
matter. TCP is guaranteed reliable but is slower.
I do have caching enabled, and it's set to cache100 entries (but I think
I'll bump it up). I actually am not clear on this, because I see, for
example, a few mails go out to yahoo in a row, and on two of them there is a
an MX resolve timeout warning from one of the DNS servers, even though
another email had just gone out to yahoo. Seems like it's not using the
cache. It's hard to tell because there is only a log entry if the lookup
fails.
>
If two mails are being sent simultaneouslay to the same domain then it is
possible for this to happen. The worker thread will first check the cache
and then do the MX lookup if the record is not found in the cache.
regards,
Howie
> Thanks,
> -Max
>
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