> My Outlook client won't even let me try and send a message to > [EMAIL PROTECTED],com > and when trying to route the same through Exchange using a POP3 client > (SMTP) the Exchange SMTP refuses to accept it for delivery. > So, I think[1] > the risk is relatively low. > > [1] Not much thought admittedly, I'm in the process of > building a new lab.
Yes, I think you're right with that one. I'm not sure I couldn't come up with a do-able example where the MTA really will get passed something it doesn't want to accept - it would be well within its rights to reject permanently a 100 squillibyte message! (And being a university, we have lots of people who'll want to try to find the loopholes...) But however we want to argue that, I'm not convinced that taking the connector down *is* appropriate behaviour. It depends what you define as "the link" - in this case there *is* SMTP connectivity; and the *retry* handler certainly regards the simple ability to make an SMTP connection as enough to mark the connector as up again. If inability to issue a RCPT command is enough to take the connector down, shouldn't a success be required to bring it up? Don't know. What would be the meaning of a message that failed with one recipient and succeeded with 10 others, for instance? The problem that we have here with this behaviour is that's it's radically different from how the Ex55 IMS did things. And isn't there an inconsistency in how things are done anyway? An "error" occurs which is deemed so serious that the connector must be marked down; yet the message which caused this is *not* requeued, and an NDR is generated. Isn't one layer saying "Hmm, an error here but I've handled it, nothing to worry about" and another saying "Hey, something really really terrible is happening?". Don't know. Anyway, I'm on holiday for a week now, so my co-workers can worry about all this! Thanks for your thoughts! Alan _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
