[Greylist-users] SMTP server pools

[Frank Bax]

A) I've had trouble posting (temp failures) for many days now (first try 
Sep7).  I know that my ISP uses SMTP server pools (Bell Nexxia / Bell 
Canada / Sympatico = 209.226.175/24).  For this message, I'm using dialup 
on a different ISP.

B) I've just gone live with greylisting (OpenBSD 3.5) and the first AOL 
email causes problems with SMTP server pool.  I got these on one message:
	64.12.138.204	-> imo-m14.mx.aol.com.
	205.188.144.208	-> imo-d22.mx.aol.com.
	205.188.157.38	-> imo-d06.mx.aol.com.
	205.188.157.39	-> imr-d01.mx.aol.com.
Not even on the same subnet - has someone got a complete list?  The list 
from cvs.puremagic.com does not include one of these ip addresses.

C) I contacted a local ISP about their SMTP server pool.  Perhaps others 
will find this information useful, I suspect a complete list of ip's for 
this ISP might be difficult to determine using the typical "black box" 
approach.

 >> 1) Does Sentex use a pool of SMTP servers?  If a message experiences
 >> temporary failure is it possible a different SMTP server will be used for
 >> the retry than was used for first delivery attempt.
 >
 > Yes.
 >
 >> 2) If (1) is true, what are ip addresses of your SMTP servers, so we can
 >> white-list them.
 >
 >These are primarily incoming servers, which may act as outgoing under
 >certain circumstances:
 >
 >/etc/namedb# host smtp.sentex.ca
 >smtp.sentex.ca has address 206.51.23.254
 >smtp.sentex.ca has address 67.43.128.2
 >smtp.sentex.ca has address 67.43.128.3
 >smtp.sentex.ca has address 199.212.134.4
 >smtp.sentex.ca has address 199.212.134.9
 >smtp.sentex.ca has address 64.7.153.30
 >smtp.sentex.ca has address 64.7.153.52
 >smtp.sentex.ca has address 206.51.23.253
 >
 >These are outgoing-only servers:
 >
 >/etc/namedb# host smarthost.sentex.ca
 >smarthost.sentex.ca has address 205.211.164.50
 >smarthost.sentex.ca has address 64.7.153.18