grimlock1 Absent Member.
Absent Member.
2240 views

Fake MX records and spam

http://wiki.apache.org/spamassassin/OtherTricks

Anyone ever try that? How did it work for you?
Labels (1)
0 Likes
18 Replies
ukdtom Absent Member.
Absent Member.

Re: Fake MX records and spam

Patrick Farrell wrote:

> Anyone ever try that? How did it work for you?


Used to, but now you blown it by posting here 😉

Suggest, if you try it out, to use the following host for the lowest
and the highest:

mail.messaging.microsoft.com


That way, you have a win-win situation 😉


--
Tommy Mikkelsen
IT Quality A/S, Denmark
Novell Support Forums SYSOP / NKP

Sorry, but no support through email
Please join http://www.open-horizons.net

Best Regards Tommy Mikkelsen Denmark Please Report back any success or failure, That way we all learn Sorry, but no support through email "I hate bugs".......Tommy Lee Jones, MIB
0 Likes
grimlock1 Absent Member.
Absent Member.

Re: Fake MX records and spam

Tommy Mikkelsen wrote:
> Patrick Farrell wrote:
>
>> Anyone ever try that? How did it work for you?

>
> Used to, but now you blown it by posting here 😉
>
> Suggest, if you try it out, to use the following host for the lowest
> and the highest:
>
> mail.messaging.microsoft.com
>
>
> That way, you have a win-win situation 😉
>
>


So you use it currently? Any problems with legit mail getting dumped?
0 Likes
ukdtom Absent Member.
Absent Member.

Re: Fake MX records and spam

LOL, and no....I don't use it....

If you look at the host I wanted you to divert your mail to, it was to
MS....Meaning your mail would end up stranded, but MS would get spammed
😉


So *DONT* follow my advise.....

When that's said...I beleave the advise you pinted us to will work for
zombies, trying it once, and then give up.....and only for bad coded
zombies.....but then again...might take 25 % of your spam....

(Poor mans Graylisting)

A wise spammer has a real SMTP server, and that will find you anyway


--
Tommy Mikkelsen
IT Quality A/S, Denmark
Novell Support Forums SYSOP / NKP

Sorry, but no support through email
Please join http://www.open-horizons.net

Best Regards Tommy Mikkelsen Denmark Please Report back any success or failure, That way we all learn Sorry, but no support through email "I hate bugs".......Tommy Lee Jones, MIB
0 Likes
kathcarruthers Absent Member.
Absent Member.

Re: Fake MX records and spam

Tommy Mikkelsen wrote:

> LOL, and no....I don't use it....
>
> If you look at the host I wanted you to divert your mail to, it was to
> MS....Meaning your mail would end up stranded, but MS would get
> spammed 😉
>
>
> So DONT follow my advise.....
>
> When that's said...I beleave the advise you pinted us to will work for
> zombies, trying it once, and then give up.....and only for bad coded
> zombies.....but then again...might take 25 % of your spam....
>
> (Poor mans Graylisting)
>
> A wise spammer has a real SMTP server, and that will find you anyway


speaking of zombies ...
http://www.mathstat.uottawa.ca/~rsmith/Zombies.pdf

--


Kathryn Carruthers
0 Likes
grimlock1 Absent Member.
Absent Member.

Re: Fake MX records and spam

Tommy Mikkelsen wrote:
> LOL, and no....I don't use it....
>
> If you look at the host I wanted you to divert your mail to, it was to
> MS....Meaning your mail would end up stranded, but MS would get spammed
> 😉
>
>
> So *DONT* follow my advise.....
>
> When that's said...I beleave the advise you pinted us to will work for
> zombies, trying it once, and then give up.....and only for bad coded
> zombies.....but then again...might take 25 % of your spam....
>
> (Poor mans Graylisting)
>
> A wise spammer has a real SMTP server, and that will find you anyway
>
>


Nooooo I know what you mean about pointing to Microsoft.. I didn't think
you pointed there 🙂 I mean pointing an mx to mail2 and mail3 @
yourdomain when mail2 and mail3 don't actually exist.
0 Likes
jmarton2 Absent Member.
Absent Member.

Re: Fake MX records and spam

Kathryn Carruthers wrote:

> speaking of zombies ...


I was thinking the same thing.

http://www.zdayishere.blogspot.com/

--
Joe
Does this washcloth smell like chloroform?

Joe Marton Emeritus Knowledge Partner
0 Likes
grimlock1 Absent Member.
Absent Member.

Re: Fake MX records and spam

Joseph Marton wrote:
> Kathryn Carruthers wrote:
>
>> speaking of zombies ...

>
> I was thinking the same thing.
>
> http://www.zdayishere.blogspot.com/
>


There are zombies on your laaaaaaaawn.....

Those who know what that's from are now cursing me for getting it stuck
in their head again.
0 Likes
jmarton2 Absent Member.
Absent Member.

Re: Fake MX records and spam

Patrick Farrell wrote:

> There are zombies on your laaaaaaaawn.....
>
> Those who know what that's from are now cursing me for getting it stuck
> in their head again.


Hmm... how about

In your heaaaaaaaaaaaad, in your heaaaaaaaaaaaaaad!

ZooooOOOmbie! ZoooooooOOOOOOOooombie! ZooooOOOOOmmmmbie-bie-bie!



--
Joe
Does this washcloth smell like chloroform?

Joe Marton Emeritus Knowledge Partner
0 Likes
Anonymous_User Absent Member.
Absent Member.

Re: Fake MX records and spam

Given what a large % of people have bad records I can't see how it would not
lose legit email. But Marc says it works for him, so that's good enough for
me. Let us know if it works, would ya? 🙂

"Patrick Farrell" <pfarrell@packereng.com> wrote in message
news:2aGim.4268$7G7.2089@kovat.provo.novell.com...
> http://wiki.apache.org/spamassassin/OtherTricks
> Anyone ever try that? How did it work for you?



0 Likes
ukdtom Absent Member.
Absent Member.

Re: Fake MX records and spam

I know, and as said.....It might cut down some of your SPAM....

And as also said....I don't use it myself.....

Got a nice Astaro box, that does graylisting instead


--
Tommy Mikkelsen
IT Quality A/S, Denmark
Novell Support Forums SYSOP / NKP

Sorry, but no support through email
Please join http://www.open-horizons.net

Best Regards Tommy Mikkelsen Denmark Please Report back any success or failure, That way we all learn Sorry, but no support through email "I hate bugs".......Tommy Lee Jones, MIB
0 Likes
grimlock1 Absent Member.
Absent Member.

Re: Fake MX records and spam

Craig wrote:
> Given what a large % of people have bad records I can't see how it would not
> lose legit email. But Marc says it works for him, so that's good enough for
> me. Let us know if it works, would ya? 🙂
>

Well I guess it's a question of mail server design. If you have 3 mx
records, 10 20 30 and 20 is the good one and 10 and 30 are bogus, does
the mail server continue to try 20 and then 30?

They should, otherwise what's the point of having multiple MX records as
they would never fail over in the event one was down.

0 Likes
Anonymous_User Absent Member.
Absent Member.

Re: Fake MX records and spam

Some legitimate email servers are configured wrong. I've seen some-to-many
with no MX records at all, or MX records pointing at their webmail server
(with no smtp).

So, logically..outbound mail servers may not conform to RFCs either.


"Patrick Farrell" <pfarrell@packereng.com> wrote in message
news:7AWim.4405$7G7.3618@kovat.provo.novell.com...
> Craig wrote:
>> Given what a large % of people have bad records I can't see how it would
>> not lose legit email. But Marc says it works for him, so that's good
>> enough for me. Let us know if it works, would ya? 🙂
>>

> Well I guess it's a question of mail server design. If you have 3 mx
> records, 10 20 30 and 20 is the good one and 10 and 30 are bogus, does the
> mail server continue to try 20 and then 30?
>
> They should, otherwise what's the point of having multiple MX records as
> they would never fail over in the event one was down.
>



0 Likes
grimlock1 Absent Member.
Absent Member.

Re: Fake MX records and spam

Craig wrote:
> Some legitimate email servers are configured wrong. I've seen some-to-many
> with no MX records at all, or MX records pointing at their webmail server
> (with no smtp).
>
> So, logically..outbound mail servers may not conform to RFCs either.


Actually that premise isn't logical.

Faulty mx records is a misconfiguration by the mail administrator and a
totally separate issue. A mail server that doesn't check the other mx
records however suffers from bad coding. I've never seen one with a
setting that lets you turn off checking multiple mx records.
0 Likes
Anonymous_User Absent Member.
Absent Member.

Re: Fake MX records and spam

Oh yeah...there's all kinds of ways. Exhibit A: the introduction of spam
and virus appliances...(think: barracuda)

The IT people who don't understand email (and they are legion) toss these
things out in front of their mail server with abandon. The same box is
often configured to do inbound and outbound email. They tweak it (or not)
and screw it all up.

I've personally seen mail get rejected to my office when the primary mx is
down. Dumb, yes.


"Patrick Farrell" <pfarrell@packereng.com> wrote in message
news:Ak4jm.4536$7G7.4125@kovat.provo.novell.com...
> Craig wrote:
>> Some legitimate email servers are configured wrong. I've seen
>> some-to-many with no MX records at all, or MX records pointing at their
>> webmail server (with no smtp).
>>
>> So, logically..outbound mail servers may not conform to RFCs either.

>
> Actually that premise isn't logical.
>
> Faulty mx records is a misconfiguration by the mail administrator and a
> totally separate issue. A mail server that doesn't check the other mx
> records however suffers from bad coding. I've never seen one with a
> setting that lets you turn off checking multiple mx records.



0 Likes
The opinions expressed above are the personal opinions of the authors, not of Micro Focus. By using this site, you accept the Terms of Use and Rules of Participation. Certain versions of content ("Material") accessible here may contain branding from Hewlett-Packard Company (now HP Inc.) and Hewlett Packard Enterprise Company. As of September 1, 2017, the Material is now offered by Micro Focus, a separately owned and operated company. Any reference to the HP and Hewlett Packard Enterprise/HPE marks is historical in nature, and the HP and Hewlett Packard Enterprise/HPE marks are the property of their respective owners.