> None of this is true for callouts. We are forced to expend server > resources in handling callouts. Our ability to receive our own > email is impaired by other people's use of callout verification. > (How well would your mailserver stand up to receiving four orders > of magnitude more connections per second than it should?)
Verizon did this to me once. A spammer was forging one of my domainnames in a spam run so VZ was issuing 70-100 callouts/second to my server. I had no usable mail service for hours, so I blacklisted their callout farm. Then they blacklisted me for blacklisting their callouts. -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
