>We send over 12,000 emails per day. Sometime in early Spring 2001,
>AOL started to automatically discard our emails to their AOL
>customers. It turns out that they implemented a new method of SPAM
>control, by checking the FREQUENCY that emails are originating from
>any given IP address. If emails arrive more frequently than 1 per
>10 seconds (approx), then AOL throws away all subsequent email
>originating from that IP.
I run a list server for couple of people who publish daily joke lists,
about 115k joke messages/day. Here�s the delivery report for Friday, by
recipient domain:
Host/Domain Summary: Message Delivery (top 20)
sent cnt bytes defers avg dly max dly host/domain
-------- ------- ------- ------- ------- -----------
46556 931m 0 17.1 s 59.0 s aol.com
15233 315179k 0 14.4 s 1.1 m hotmail.com
10259 208026k 0 11.2 s 1.4 m yahoo.com
3795 73196k 2174 25.5 m 5.6 h webtv.net
2775 56619k 0 12.6 s 32.0 s cs.com
1975 38716k 0 14.5 s 1.6 m msn.com
1707 34460k 0 11.4 s 1.3 m home.com
Note that the 46K msgs to AOL, nearly 1 gb, was delivered in 3 hours. In
your period of 10 secs, my list server would have delivered about 45
messages to AOL. Maybe they all go down the tubes, but I really doubt
it. The people who publish the lists and their list subscribers seem to
have a lot of rapport, and there are TONS of complaints from AOL members
when the daily joke message doesn�t arrive, due to the messages not having
been sent out that day. I don�t think AOL is silently discarding 46K
msgs/day.
Plus, as server admin, I see a lot of bounces from AOL addresses. If AOL
was discarding mail, their wouldn't be any bounces.
Len
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