rare email problem

I have this clients domain on Server03 which is a "slave" in a trust relationship. I tried to email from that domain to hotmail it sends fine, but sending to -or receiving from- my email sales@e-z-hosting.com which is on Server01 ("master" in the trust relationship) is not working. here is the problem;

while sending:
in /var/log/exim_mainlog of server03 it shows it sent "completed" from that clients domain - no errors, but in /var/log/exim_mainlog of Server01 it does not show any email received!! [when I send from hotmail to sales@e-z-hosting.com it does show received fine in /var/log/exim_mainlog of Server01]

while sending from sales@e-z-hosting.com to that domain I get this error in /var/log/exim_mainlog of Server01:
2004-01-11 18:49:44 1AfpKx-00007n-FS <= sales@e-z-hosting.com H=bzq-218-190-161.red.bezeqint.net (YECHISHNEUR) [81.218.190.161] P=smtp S=1381 id=00b501c3d89d$95586850$a1beda51@YECHISHNEUR
2004-01-11 18:49:44 1AfpKx-00007n-FS == dj@lealos.com R=lookuphost T=remote_smtp defer (0): SMTP error from remote mailer after RCPT TO:<dj@lealos.com>: host lealos.com [69.93.42.42]: 451 Temporary local problem - please try later
and in this error in /var/log/exim_mainlog of Server03:
2004-01-11 18:49:44 remote host address is the local host: host42.localserver.us (while verifying <ezhost@host42.localserver.us> from host (host122.localserver.us) [69.56.176.122])
2004-01-11 18:49:44 H=(host122.localserver.us) [69.56.176.122] sender verify defer for <sales@e-z-hosting.com>: remote host address is the local host
2004-01-11 18:49:44 H=(host122.localserver.us) [69.56.176.122] F=<sales@e-z-hosting.com> temporarily rejected RCPT <dj@lealos.com>: Could not complete sender verify

what do you guys think?

 

 

 

 

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