Re: Excessive bounces on this list

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On Tue, 2007-10-30 at 00:53 +1030, Tim wrote:
> On Mon, 2007-10-29 at 09:25 +1100, Simon Slater wrote:
> > Just on the technical side, what actually causes the bounce?  If my
> > allocation on the ISP is full I understand that.  Otherwise is it
> > their spam filtering
> That's one likely reason (your mailbox being too full at the time).  It
> could also be that the entire ISP's mail system was too full or too
> busy, from time to time.  Or there was a networking problem between your
> ISP and the list.
> If your ISP uses greylisting, it rejects initial postings expecting the
> sending server to try again, later.  Some senders will take the initial
> rejection and never try again.  Some will try again later, but the
> "later" could be minutes, hours, or days later.  If the ISP uses really
> crap greylisting, it might reject the resend, too.
> There's other anti-spam techniques that can backfire, too.  If they
> don't like the look of the mail (mail not addressed "to" one of their
> users, as list mail isn't; the same message being received by many of
> their users; mail coming from lists, etc.).  Some spam filtering is
> less-than well thought out.
Thanks Tim.

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