> 1. sender@ does not exist (aka no return path), which is RFC > illegal.
Yeh, that's why I call it illegitimate, and I see no reason to bend over backwards for this deliberate misuse of the protocol. If the sender can't afford to even devnull their bounces, they're a joke and/or they don't have anyone technical advising their abusive marketers (which should also be duly punished). > 2. DNS query for MX/A of @label.sender.domain gets an answer, but > trying to contact the MX/A times out. Same as above. If you don't field bounces, there's no reason for me to accept your mail. Individual whitelisting is an exception, but in the absence of prevailing proof to the contrary, there's nothing that should stop someone from assuming by default that a mail from a nonexistent sender is garbage. > The types of legit senders that do this are > stock/financial/newsletters (many of which have paid subscriptions), > marketing mail shots, etc. I oversee millions of "stock/financial" e-mail blasts, and I would not tolerate them being sent with nonexistent sender. I never expect delivery of those messages, and in fact when some accidentally go out that way, I reprimand strongly. If you want to be legitimate, be traceable, clean your lists, etc. Look, I know *how* you send from a nonexistent sender. Just because it can be done does _not_ mean it's in any way acceptable. Just look at what happens: here we're talking implicitly about a "weakness" in SAV requiring workaround whitelisting, when the weakness is really the brain-addled people who would deliberately make their "legit" sends look like spam. --Sandy ------------------------------------ Sanford Whiteman, Chief Technologist Broadleaf Systems, a division of Cypress Integrated Systems, Inc. e-mail: [EMAIL PROTECTED] SpamAssassin plugs into Declude! http://www.imprimia.com/products/software/freeutils/SPAMC32/download/release/ Defuse Dictionary Attacks: Turn Exchange or IMail mailboxes into IMail Aliases! http://www.imprimia.com/products/software/freeutils/exchange2aliases/download/release/ http://www.imprimia.com/products/software/freeutils/ldap2aliases/download/release/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
