What are the applications that need DNS reverse resolution?

[Peter Dambier]

Barry you are right. it is SMTP. Did not wear my glasses when
typing :)


Barry Margolin wrote:
> In article <gd1sag$14a8$1 at sf1.isc.org>,
>  Peter Dambier <peter at peter-dambier.de> wrote:
> 
>> Thinking of mail, first our mailserver's ssh login does not let
>> you in if you do not have a name. Same goes for many web sites.
> 
> I doubt that many web sites do this.  Lots of ISPs don't configure 
> reverse DNS for their customers, although this has gotten much better in 
> recent years.  Second, most web sites try to provide the fastest 
> response time they can, and doing a reverse lookup would slow things 
> down too much.
> 
>> Next the IMAP server looks for a valid name and the SMTP daemon
>> wont even ask you for AUTH. Without AUTH there is no mail forwarding.
>>
>> The IMAP receiver on port 25 will treat emails as spam if your
>> reverse name and your sender come from different TLDs.
> 
> ITYM SMTP.  IMAP is used for reading mail, not sending it.
> 

-- 
Peter and Karin Dambier
Cesidian Root - Radice Cesidiana
Rimbacher Strasse 16
D-69509 Moerlenbach-Bonsweiher
+49(6209)795-816 (Telekom)
+49(6252)750-308 (VoIP: sipgate.de)
mail: peter at peter-dambier.de
http://www.peter-dambier.de/
http://iason.site.voila.fr/
https://sourceforge.net/projects/iason/