Re: balsa problems, probably esmtp related, probably my own system

[Ali Akcaagac <ali akcaagac stud fh-wilhelmshaven de>]

On 2001.10.05 12:47:53 +0200 M . Thielker wrote:
> Hi,
> 
>   this does not appear to be a forward resolution problem. If pinging the 
> ISP's mail server by name works, then libESMTP will also be able to connect 
> to it by name.
> I have come across some SMTP servers that will not accept client 
> connections unless they can do a successful reverse lookup on the address 
> of the connecting client.
> This seems to be such a case. If your IP cannot be resolved to a name by an 
> IRC server, it most likely also cannot be resolved by the mail server.
> This would happen if your ISP's reverse zone is broken, or the server 
> serving it is down.
> There is nothing you can do about that, really. You just will not be able 
> to connect to the SMTP server until the DNS is fixed.
> To confirm that that is the problem, try telnetting to port 25 on the SMTP 
> server. If it takes an inordinately long time to show a banner, or gives an 
> error code and closes the connection, that is where your problem lies.
> Doing a reverse lookup on the client address is one of the things that have 
> arisen after the spam avalanche really got rolling. More and more ISP's do 
> it to prevent or discourage would-be spammers from using their mail 
> servers. See also the discussions about open mail relays and such.

yeah exactly this happens, telnetting to port 25 will take ages.. my solution
therefore was to change my outgoing smtp server to my university smtp server
instead of my isp's smtp server...

btw: thanks for these few lines, this also solved another problem at least
for some friends of me that complained that their local smtp server takes
ages for connection.. maybe its related to the same issue..

-- 
Name....: Ali Akcaagac
Status..: Student Of Computer & Economic Science
E-Mail..: mailto:ali.akcaagac@stud.fh-wilhelmshaven.de
WWW.....: http://www.fh-wilhelmshaven.de/~akcaagaa