[ale] sendmail -mindspring-ISP ignorance

[James Kinney]

Mindspring actually has OK filters on mail being sent to their customers.
If the address sent to is @mindspring.com AND the mailserver that sent it
has a bogus domain (i.e. lookups on both the domain and ip returned from
the domain lookup don't match), the mail is bounced.

JimK
Local Net Solutions

On Fri, 1 Dec 2000, Armsby John-G16665 wrote:

> I now have sendmail working better.  I can send as root to root and that works.  I can send email outside of the mindspring.com domain.  I CAN NOT send email to my mindspring account.  Obviously this relay business and domain name is causing my sendmail to think that the mindspring account is part of the local host.  I guess it is not going to relay anything inside of mindspring.com  I THOUGHT I had removed any reference in my config files to mindspring.com, i.e. hosts file?  Since my Linux box is a DHCP setup, I should have NO DOMAIN listed anywhere?  That way any domain would be relayed to mindspring?
> 
> Getting there....... Thanks for your help.
> 
> John
> 
> 
> -----Original Message-----
> From: Bob [mailto:bob at cavu.com]
> Sent: Thursday, November 30, 2000 3:49 PM
> To: John.Armsby
> Cc: ale at ale.org
> Subject: Re: [ale] sendmail -mindspring-ISP ignorance
> 
> 
> > # Smart host
> > DS smtp.mindspring.com
> 
> Try changing to
> 
> DSmail.mindspring.com
> 
> Mindspring likes to change its server names and IP addresses when they
> upgrade hardware because they're too stupid to have the new system have
> the same name and IP address as the old system and simply rename the old
> system (now destined for some other service).  They also cannot be
> bothered to send email to their customers when this happens.
> 
> Note also that there must not be a space in this line.
> 
> Further, your sending system address must be that of a real system resolvable
> through a DNS server that only sees systems on the Internet.
> 
> I deal with the latter by doing "hostname someonereal.com" on my system;
> I don't know the proper sendmail.cf or sendmail.mc command to fake this
> offhand.
> 
> Bob Toxen, CTO
> Fly-By-Day Consulting, Inc.      "Don't go with a fly-by-night outfit!"
> Quality Linux & UNIX security and software consulting since 1990.
> bob at cavu.com
> http://www.cavu.com/
> http://www.realworldlinuxsecurity.com/ [My new book: Real World Linux Security]
> http://www.cavu.com/sunset.html/       [Sunset Computer]
> 
> GPG Public key available at http://www.cavu.com/pubkey.txt (book at cavu.com)
> pub  1024D/E3A1C540 2000-06-21 Bob Toxen <book at cavu.com>
>      Key fingerprint = 30BA AA0A 31DD B68B 47C9  601E 96D3 533D E3A1 C540
> sub  2048g/03FFCCB9 2000-06-21
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