[Exim] large number of command timeouts using Exim-4.20

Hi,

We are experiencing a large number of "command timeouts" from a few
hosts. Can anyone think of the reasons for this happening might be. We
are receiving mail from other hosts without problem.

Thanks.

- -ben

2003-08-08 07:35:17 SMTP command timeout on connection from
imf07aec.mail.bellsouth.net [205.152.59.55]
2003-08-08 07:36:53 SMTP command timeout on connection from
fed1mtai04.cox.net [68.6.19.251]
2003-08-08 07:37:26 SMTP command timeout on connection from
fed1mtao02.cox.net [68.6.19.243]
2003-08-08 07:38:16 SMTP command timeout on connection from
lakecmmtao02.coxmail.com [68.99.120.69]
2003-08-08 07:39:17 SMTP command timeout on connection from
halfpat.half.com [66.135.196.11]
2003-08-08 07:40:23 SMTP command timeout on connection from
7206-1-ric-64-83-29-182-serial.t1.cavtel.net [64.83.29.182]
2003-08-08 07:44:12 SMTP command timeout on connection from
fmr05.intel.com [134.134.136.6]
2003-08-08 07:47:11 SMTP command timeout on connection from [204.255.71.6]
2003-08-08 07:49:54 SMTP command timeout on connection from
dal1ts060.processrequest.com [216.39.66.226]
2003-08-08 07:53:35 SMTP command timeout on connection from
lakecmmtao02.coxmail.com [68.99.120.69]
2003-08-08 07:53:54 SMTP command timeout on connection from
imf05aec.mail.bellsouth.net [205.152.59.53]
2003-08-08 07:57:00 SMTP command timeout on connection from
fed1mtao02.cox.net [68.6.19.243]
2003-08-08 07:57:43 SMTP command timeout on connection from
fed1mtai05.cox.net [68.6.19.250]