I have logs that look as follows:

2004-04-13 05:56:34 66.135.215.231
smf-camp2.smf.ebay.com SMTPSVC1 BUC 10.10.10.10 0 EHLO
- +smf-camp2.smf.ebay.com 250 0 195 27 10 SMTP - - - -
2004-04-13 05:56:34 66.135.215.231
smf-camp2.smf.ebay.com SMTPSVC1 BUC 10.10.10.10 0 MAIL
- +From:<eBay.190444965.51569.0@reply3.ebay.com> 250 0
63 75 0 SMTP - - - -
2004-04-13 05:56:34 66.135.215.231
smf-camp2.smf.ebay.com SMTPSVC1 BUC 10.10.10.10 0 RCPT
- +To:<valid@placeformail.com> 250 0 40 37 0 SMTP
- - - -
2004-04-13 06:13:55 66.135.215.231
smf-camp2.smf.ebay.com SMTPSVC1 BUC 10.10.10.10 0 TIMEOUT - smf-camp2.smf.eb
ay.com 121 3889661762 84 4
1041087 SMTP - - - -
2004-04-13 06:13:55 66.135.215.231
smf-camp2.smf.ebay.com SMTPSVC1 BUC 10.10.10.10 0 QUIT
- smf-camp2.smf.ebay.com 240 1041367 84 4 1041097 SMTP

Most of my mail gets through no problem but this one and mac.com both have t
his same problem, they TIMEOUT...
Does anyone know what this is about?  Could this be related to my server per
forming a reverse lookup?..
Does the fact that my server is NAT'd play a role?  I tried to play a bit wi
th the timeout setting, changing it to greater than 10, I haven't seen anyon
e else asking this question.  It's confusing me, is this a configuration iss
ue for my server? or a prob
lem with the connecting server?

I really want to get this resolved since I need to receive my emails..

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