Can I perform tests such as...

Valid MX
Valid Helo etc..
Valid rDNS =~ fDNS

On 05/17/07 09:00, daquino wrote:
> Can I perform tests such as...
>
> Valid MX
> Valid Helo etc..
> Valid rDNS =~ fDNS
>

Have a look at this site - lots of great tests:

<http://www.dnsstuff.com/>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Fri, 17 May 2007, daquino wrote:

> Can I perform tests such as...

sendmail 8.14.x do all these

>
> Valid MX
FEATURE(`badmx')

> Valid Helo etc..
FEATURE(`block_bad_helo')

> Valid rDNS =~ fDNS
FEATURE(`require_rdns')
^^^^^ This feature only ensures a reverse exists, you dont want to make a
match for forward and reverse being the same, or you wont get mail from
most places, since hosting companies don't configure their mail servers
this way (nor should they).


- --

Cheers
Res

Vote for your favourite MTA at http://polls.ausics.net/v3.php
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFGTMvLsWhAmSIQh7MRAgpaAJ0VEHnB7xXxDv7/84eUC4tcIGHY/ACeKgio
9WabFZcvPI21koMR1ratojA=
=7ODg
-----END PGP SIGNATURE-----

> FEATURE(`require_rdns')
> ^^^^^ This feature only ensures a reverse exists, you dont want to make a
> match for forward and reverse being the same, or you wont get mail from
> most places, since hosting companies don't configure their mail servers
> this way (nor should they).


Why should hosting companies not do this ?

And where did you learn about these features... I have bought the
sendmail cookbook but as I'm looking now it goes up to 8.12.10... :
[ is there any newer books ?

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Sat, 18 May 2007, daquino wrote:

>
>> FEATURE(`require_rdns')
>> ^^^^^ This feature only ensures a reverse exists, you dont want to make a
>> match for forward and reverse being the same, or you wont get mail from
>> most places, since hosting companies don't configure their mail servers
>> this way (nor should they).
>
>
> Why should hosting companies not do this ?

Because most hosting companies will assign only one IP as the real machine
IP, which will have F/R matching names, to assign other IP's is cumbersome
and messy and a pure waste of IPs.

you may have many many mail.example.com mail.example.net mail.test.com all
on the same machine, mostly to one IP, sometimes with their own IP,
however when that machnie sends out, its common that it uses its real
machine name, the primary IP of the box.
A typical host server may hold up to 1500 plus domains, no admin is going
to go to hte trouble to configure the box so that each sending out smtp
session matches the domain, OK may be some do, but you'll find you are
paying more for that service.

>
> And where did you learn about these features... I have bought the
> sendmail cookbook but as I'm looking now it goes up to 8.12.10... :
> [ is there any newer books ?

I have used them since they were hacks in previous series, however they
are standard features as of 8.14.0 (bad mx feature requires you to build
with regex though).

As for new stuff in sendmail, you should always read the release notes



- --

Cheers
Res

Vote for your favourite MTA at http://polls.ausics.net/v3.php
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFGTiOdsWhAmSIQh7MRAsT7AKCsyU4OQZFgbPWLluX/FXAwhZcS8gCfWb7X
0zCh1rnfmh4imSR+aMY0N54=
=cJmU
-----END PGP SIGNATURE-----