I have something of a large recurring problem. I've looked over the web and searched
all the resources that I know of to make this dern thing work correctly. Here is the
problem:
- A user, using an earthlink 56K dialup tries to send mail through my smtp server.
- 9 times out of 10, the mail fails because of a 'no transport provider' error.
Basically the SMTP server isnt talking.
Here's what I've done to the mail server thus far:
qmail 1.03 vanilla
big-todo patch
large concurrency
smtp_auth (plain & cram-md5)
The mailserver runs under supervise through tcpserver with ident and DNS lookup
turned off for speed, as well as -l 0
There are no log entries at my end to indicate why /only/ dialup users are having
problems with /only/ the SMTP server (they can recieve fine, qpopper is kicking
butt). There is no large volume of messages in the queue, no real load on the server
at all (Sun Ultra Enterprise 2, Solaris 8, 1.2G RAM, dual 200mhz processors), and
the problem disappears when people hit the mailserver from the LAN/WAN. In fact, the
general concensus within the office is that the mailserver is running significantly
faster than it did before I tweaked everything for speed.
I would appreciate any suggestions or ideas about why this might be occuring.
Rob
