--On 4 August 2006 02:03:00 +0800 W B Hacker <[EMAIL PROTECTED]> wrote:
> Magnus Holmgren wrote: > >> On Wednesday 02 August 2006 18:45, Jeremy Harris took the opportunity to >> say: >> >>> Chris Lightfoot wrote: >>> >>>> No valid bounce will have >1 >>>> recipient >>> >>> I think there are cases (mailinglists?) where that isn't so. >> >> >> Example: I send a mail somewhere with a group alias, like >> [EMAIL PROTECTED], as sender. It bounces. The bounce comes back, >> [EMAIL PROTECTED] is expanded into [EMAIL PROTECTED] and >> [EMAIL PROTECTED], which are for some reason forwarded to >> [EMAIL PROTECTED] and [EMAIL PROTECTED] Voilà, a mail with >> empty sender and multiple recipients. >> Damn, foiled again! See my email a few minutes ago in this thread, where I proved that this can't happen because a return path can only contain one address. Clearly, I didn't consider what happens to the bounce message after it's generated. > > Is that seen as 'multiple recipients' on initial presentation to Exim? Yes, if Exim is handling the "otherexample.net" domain. However, in this rather unusual(?) case, you might expect [EMAIL PROTECTED] to be monitored directly, and not reliant on the otherexample.net domain functioning. Perhaps it's time example.com got it's own IMAP server, and chris and magnus get themselves a shared mailbox. > The expansion could (should?) occur later, so 'not necessarily'. But possibly. > w/r Mailing Lists - to the extent that an MLM is intelligently > configured, any 'proper' bounces should come back in a format that the > MTA simply hands-off to the MLM for handling. So, we're not really talking about something as sophisticated as a Mailman list. Of course, this is a good argument for using a proper MLM, but if we're talking about a system adminstration alias, we might want it to operate properly even when the MLM isn't. > Nothing is without some downside, but so long as spammers do what all too > many of them do, limiting bounces to a single recipient still seems to > do more good than harm. > > > Bill -- Ian Eiloart IT Services, University of Sussex -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
