Re: [cobalt-users] Slow SMTP (and PHP mail) Response

["Steve Werby" <steve-lists@xxxxxxxxxxxx>]

"Bruce Vander Werf" <brucev@xxxxxxxxxxxxx> wrote:
> I am using SendMail 8.10.2 on a Cobalt RAQ4.
>
> Calls to the PHP mail() function locally from our web pages take a very
long
> time to resolve. Also, if I try to Telnet to port 25 from a remote
machine,
> it connects immediately, but it takes about 30 seconds for the SMTP server
> to respond. Telnet to port 23 resolves immediately, as does normal web
> access. I am using the same hostname to connect remotely to SMTP, Telnet,
> and the web server.
>
> What is different about SMTP that would cause the delay in response, both
> locally and from a remote site? Any configuration parameters I need to
look
> at?

It could be related to not having reverse dns configured for your IPs.  Let
us know if you have reverse dns setup - it's generally something your ISP or
upstream handles for you unless they've delegated this to you (most don't).

--
Steve Werby
President, Befriend Internet Services LLC
http://www.befriend.com/