> i have had AOL subsscribers who *DO* retreive their mail regularly. But they
> simply get so much of it they get full mailboxes in very short time.
>
> ie: full mailbox is a *transient* problem
>
> why dont service providers with mailbox limits return a RETRYABLE transient
> (resource unavailable?) error to my smtp so that *i* may queue/retry for
> a couple days?
> the brutal delivery failure is uncalled for in my opinion too.
I agree with this. If a user doesn't have any more message slots,
return a 452 error for that user's RCPT command. Even better, if
your SMTP supports the SIZE extension, and the sender-SMTP asserts
SIZE=XXXX in the MAIL command, you can decide whether the message
is too big before accepting it. (See RFC 1653.)
But to put it in other terms:
Addresses that bounce mail get deleted from my mailing lists.
This penalizes those who use service providers that either (a)
are unreliable or (b) gratuitously bounce mail for transient errors.
(more often the former than the latter). I've had several subscribers
change to more reliable service providers after being deleted from
a list once or twice.
(I've seen a LOT worse than AOL, so I'm not complaining about them
per se.)
Keith
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