Lack of rDNS records will cause messages to fail to MSN/Hotmail, and
Yahoo! accounts (don't know about Gmail)... I'm not at all worried about
the blocking of messages (the SPAM he doesn't see he won't bitch
about)... he just didn't like the ***SPAM*** label behavior! BTW: I
warned him that there would be an increase in SPAM -- we'll see how long
it takes him to decide to turn SA back on!
Dan
On 5/3/2011 1:58 PM, Michael J. Colvin wrote:
This is true, however a LARGE amount of spam is sent from IP's with no RDNS.
By not blocking those e-mails, you're certainly forcing your mail server to
deal with a MUCH larger amount of mail, most of which would be spam. I
guess if you don't have a resource issue, and don't mind wasting resources
on handling spam, that may or may not be rejected by SpamAssassin down the
road, then that's fine.
I agree that, if the customer wants the spam, I'm more than happy to let
them have it. However, I won't do it at the detriment of other users.
If you've never had a "Spam Attack", where your server is constantly
bombarded by spammers, then when you do, you'll wish you had SpamDyke. :-)
When your server (Or the OP's server) is being hammered by a spammer, and
comes here to complain about how his server is overloaded and legit e-mail
is timing out because all of his SMTP ports are being bogarted, the first
suggestion is going to be "Are you running SpamDyke".
And, yes... When a client is not getting e-mail because the sender's mail
server (Usually an internal Exchange server) does not have an RDNS, I tell
them that's why. I even have a form e-mail I send them to send the blocked
person. I've actually picked up several consulting gigs (Fixing their RDNS
issue) and spam filtering customers from this...
Lack of RDNS is becoming a much more common antispam check. So, if you're
blocking it, others are also likely blocking it, and, in the end, the
offending server's admin is going to have to resolve the issue...
Mike
-----Original Message-----
From: Peter Peltonen [mailto:peter.pelto...@gmail.com]
Sent: Tuesday, May 03, 2011 10:38 AM
To: qmailtoaster-list@qmailtoaster.com
Subject: Re: [qmailtoaster] Re: SPAM Designation Option
Hi,
On Tue, May 3, 2011 at 7:31 PM, Eric Shubert<e...@shubes.net> wrote:
that. Spamdyke false positives are practically nonexistent though, so you
might want to just leave spamdyke active and not tell him about it. Then
again, if he insists on receiving spam, I'd charge him extra for the load
it'll cause on your server as well as the trouble of configuring spamdyke.
;)
Even if Spamdyke is correct, it does not mean that the end behaviour
is what the customer expects.
I have ran into issues where customers haven't received email they
were expecting because of Spamdyke rejecting a message because of
missing reserve dns. And it does not help telling the customer that
the sending server is not properly configured, if they can receive the
same email with their Gmail or some other account...
I have been playing around with an idea that I should create a page
for each customer where they could check the sending addresses for
denied messages. So if there is a "real" message denied I could then
offer an option to white list that mail server or sending address, so
that the customer could try contacting the sender again.
Best,
Peter
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If you need professional help with your setup, contact them today!
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