[Exim] Odd behavior with DynDns backup MX

Ok, this is very strange. I need help. I have exim on two machines in the
DynDNS domain. One is almost always up (DSL) the other is only up around 50%
of the time. DSL machine is shortcircuit, the other machine (on a dialup) is
called EgliFam (my wife's idea). So I setup my dyndns record for
eglifam.dyndns.org to point to shortcircuit.dyndns.org as a backup MX. Exim
recieves the mail no prob, tries to connect to eglifam, cannot connect. But
instead of storing the mail and waiting, it tries to connect to itself
(using it's other names). IT keeps looping till finally it quits after
detecting a possible mail loop.

Here's a log segment:

2001-11-14 15:46:29 1648nc-0006i2-00 => queenie@???
R=amavis_router T=amavis
2001-11-14 15:46:29 1648nc-0006i2-00 Completed
2001-11-14 15:46:50 1648nd-0006iB-00 eglifam.dyndns.org [166.70.6.151]:
Connection refused
2001-11-14 15:46:52 1648nz-0006iE-00 <= <>
H=slkcdslgw9poolb110.slkc.uswest.net (shortcircuit.dyndns.org)
[65.100.210.110] P=esmtp $
2001-11-14 15:46:52 1648nd-0006iB-00 => queenie@???
R=lookuphost T=remote_smtp H=shortcircuit.dyndns.org [65.100.210$
2001-11-14 15:46:52 1648nd-0006iB-00 Completed
[repeating error deleted to save bandwidth]
2001-11-14 15:47:18 1648oQ-0006kh-00 <= <> U=amavis P=scanned-ok S=7903
id=E1648nW-0005oa-00@???
2001-11-14 15:47:18 1648oP-0006kY-00 => queenie@???
R=amavis_router T=amavis
2001-11-14 15:47:18 1648oP-0006kY-00 Completed
2001-11-14 15:47:20 1648oR-0006kk-00 <= <>
H=slkcdslgw9poolb110.slkc.uswest.net (shortcircuit.dyndns.org)
[65.100.210.110] P=esmtp $
2001-11-14 15:47:20 1648oQ-0006kh-00 => queenie@???
R=lookuphost T=remote_smtp H=shortcircuit.dyndns.org [65.100.210$
2001-11-14 15:47:20 1648oQ-0006kh-00 Completed
2001-11-14 15:47:21 1648oT-0006ku-00 <= <> U=amavis P=scanned-ok S=8307
id=E1648nW-0005oa-00@???
2001-11-14 15:47:21 1648oT-0006ku-00 ** Too many "Received" headers -
suspected mail loop


Whats going on? Why is it always calling itself again? slkcdslgw9boolb110 is
the address my DSL currently has from my local TelCo.

Any help is appreciated!