Sendmail: How does one blacklist annoying spammers?
Ed Greshko
Ed.Greshko at greshko.com
Sun Jun 27 00:55:11 UTC 2010
On 06/27/2010 08:46 AM, Tim wrote:
>
> Where greylisting, typically, becomes a cropper is when some *BIG*
> service like Yahoo tries to mail you, gets grey listed, and it spits the
> dummy about not being able to post (some do get pernickity about it,
> with a low threshold for suspending posts that didn't immediately get
> through).
>
> Or, when it retries, the retry comes from a different server than the
> first attempt, so that gets greylisted. And your message plays "hot
> potato" through several different servers, each one getting separately
> greylisted. If you're lucky, eventually it comes back through one that
> your server will allow. If you're not, it'll go through so many
> attempts that your server disallows it for taking too long, or their
> server aborts attempting because each attempt gets disallowed.
>
>
FWIW, in all of the installations if done these types of problems have
never surfaced. I did specifically wonder about the second paragraph
and I analyzed several months of logs from 4 high volume sites looking
for an occurrence. Never found one. YMMV.
Do you know of any MTAs able to share outbound queues that would account
for this?
--
You can get *anywhere* in ten minutes if you drive fast enough. 葛斯克
愛德華 / 台北市八德路四段
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 260 bytes
Desc: OpenPGP digital signature
Url : http://lists.fedoraproject.org/pipermail/users/attachments/20100627/f447174c/attachment.bin
More information about the users
mailing list