On 3/31/18 3:35 PM, Lindsay Haisley wrote:
On Sat, 2018-03-31 at 14:50 -0400, Richard Damon wrote:
To me the issue sounds like why is fmp.com forwarding spam?
If this is a case of fmp.com offering forwarding mailboxes to users, who
might be using gmail as a final destination, then yes, fmp needs to try
to be as good at detecting spam as gmail or users need to accept the
increased spam levels.
If pigs could fly ....! I do the very best job I can of filtering spam
from inbound email, and get about 90% of it, maybe more, but fighting
spam is a forever job of whack-a-mole. I certainly wish that I could do
as good a job of parsing spam from legit email as Gmail does, but I'm a
one-person shop, and have many tasks. Gmail has dozens, perhaps
hundreds of very smart people assigned to managing their spam
filtering, and they do a very good job of it. I could _never_ hope to
match their efficiency or accuracy, nor could most small operations
such as FMP Computer Services.
But coming at least close is the job you sign up for in being a mail
forwarder. You at least need to be good enough that you aren't seen by
google as an uncaring domain, and maintain enough information that they
can continue to do what they do well.
The problem is that Gmail is whitelisting based on the From address,
rather than the Reply-To address, which should be an _option_ open to
users. On Google's scale of operation, I'm just a fly on a dog turd so
any feature which might benefit my users and subscribers is pretty much
a no-nevermind for them.
Which is why I was saying make a 1:1 mapping of From addresses to
Reply-To addresses.
Another option is to deterministically munge the from address so every
incoming email address gets a unique fmp address that it represents (it
doesn't have to be absolutely unique, mostly unique is likely good
enough), something like replace the at with _at_ and add a tail wart
like _dm...@fmp.com (so you can have other addresses an not worry about
possible overlaps with those) and use that as the from address. Then a
reply will only whitelist that specific original from address.
Which, as I noted in my original post, will cause the Gmail user's mail
account to end up with a whole lot of useless whitelisted address which
would need to be deleted, and FMP's server might well end up getting
blacklisted as a result.
No more than if GMail did implement a white-list on Reply-To addresses.
--
Richard Damon
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