Re: Winsock Error 10066.. (General questions)

by Amedeo, Tuesday, March 31, 2009, 17:31 (5503 days ago) @ wodSupport

can you be more specific under which circumstances this error appears, and in which component? Kreso

..sure

Component: wodSmtpServer 2.3.4
I'm using Visual Basic 6
Operating System tested: WinXP, Win 2k3 server

After the initial smtp dialog (helo, mail from, rcpt to) we have the
message itself .. for example..

---
220 SMTP Server (ready).
helo testing.domain.ext
250 Hello testing.domain.com, nice to meet you
mail from: origin@domain.com
250 origin@domain.com... sender ok
rcpt to: destination@otherdomain.com
250 destination@otherdomain.com... recipient ok
data
354 enter mail, end with . on a line by itself
...
---

At this point the component try to send the message (headers and body) but frequently timeout occurs.
I spent a lot of time in understanding what was going on.. then i try to intercept all winsock errors and ..here.. i found the 10066 winsock error.
Googling i've found that one of the possible timeout reason could be incorrect MTU handshaking. I tried to disable dynamic MTU in windows TCP/IP and i lowered it down to 1480.
Timeouts occurs less frequently now.. but sometimes the problem persists.

I hope the explanation is comprensible .. my english is not so good

Bye..

Amedeo.