[colug-432] Recent change in retry behavior from large e-mail sites, affecting greylisting?
josh at globalherald.net
Wed Jan 12 10:28:06 EST 2011
On Wed, 12 Jan 2011, Rob Funk wrote:
> They may be using a blocklist that prevents them from receiving mail from IP
> addresses whose Terms Of Service prohibit running mail servers. Many home
> ISPs add their address blocks to such blocklists themselves, and many mail
> servers (including mine) use such lists. Mail coming from residential
> addresses is almost always spam or malware from zombie machines.
What's interesting is, MSN and Hotmail are the *only* providers for which
this was a problem. Even Microsoft's Small Business web and e-mail
service, upon receiving an e-mail from me, sent me a bounce back saying,
"If you are a real human click on this link and we will whitelist your IP
address." (And yeah, I obviously checked the address and the
corresponding IP address before clicking on the link. :) )
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