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[cobalt-users] email may be forged ? what gives?



Sep 16 09:36:48 dserv1 in.qpopper[32361]: (v?) POP login by user "user101"
at (cdm-6-15-10.rsvl.cox-internet.com) 66.233.15.10 [pop_pass.c:1023]


Sep 16 09:37:37 dserv1 sendmail[32373]: JAA32373: ruleset=check_rcpt,
arg1=<test101@xxxxxxxxxxx>, relay=cdm-66-15-10.rsvl.cox-internet.com
[66.233.15.10] (may be forged), reject=550 <test101@xxxxxxxxxxx>... Relaying
denied

Sep 16 09:37:37 dserv1 sendmail[32373]: JAA32373: ruleset=check_rcpt,
arg1=<ted@xxxxxxxxxxxxxxxxxxxx>, relay=cdm-66-15-10.rsvl.cox-internet.com
[66.233.15.10] (may be forged), reject=550 <ted@xxxxxxxxxxxxxxxxxxxx>...
Relaying denied

Sep 16 09:37:40 dserv1 sendmail[32373]: JAA32373:
from=<test101@xxxxxxxxxxxxxxxxx>, size=0, class=0, pri=0, nrcpts=0,
proto=ESMTP, relay=cdm-66-15-10.rsvl.cox-internet.com [66.233.15.10] (may be
forged)

I have this client who all of a sudden can not send mail and gets this relay
not allowed error. Was working for over a year. To temp fix I added the IP
into the relay allow list on the server. The server is an old Cobalt RAQ2.