Fedora Users — Sendmail authentication issue or spam?

Hi guys,

I just signed up to a new ISP..and I seem to have some issues sending mails out via them using my own domain. They seem to have blocked smtp traffic hence you have to send all mails via their server. However they require that smtp is authenticated, however I have configured sendmail and still I can't seem to send a mail out.

Below are some of my log files and configuration setting...I can't seem to get any help from my isp as they seem to only support windows...

AuthInfo:mail.cobranet.org "U:root" "I:hello@xxxxxxx" "P:12345678"

Mar 8 15:40:16 kiibati sendmail[1553]: k28EeEgU001553: from=<gshobowale@xxxxxxxxxxxxxxxx >, size=1221, class=0, nrcpts=1, msgid=<004201c642df$a33f6960$6500a8c0@fly1>, proto=ESMTP, daemon=MTA, relay=[192.168.0.101]

Mar 8 15:40:22 kiibati sendmail[1555]: STARTTLS=client, relay=isp.org ., version=TLSv1/SSLv3, verify=FAIL, cipher=AES256-SHA, bits=256/256

Mar 8 15:40:25 kiibati sendmail[1555]: k28EeEgU001553: to=<gshobowale@xxxxxxxxx>, ctladdr=< gshobowale@xxxxxxxxxxxxxxxx>

(501/100), delay=00:00:09, xdelay=00:00:08, mailer=relay, pri=121221, relay=isp.org. [ 11.11.11.113], dsn=5.1.1, stat=User unknown

Mar 8 15:40:25 kiibati sendmail[1555]: k28EeEgU001553: k28EePgU001555:

DSN: User unknown

However below is the error I get when I pop the mail on my desktop....so I am not sure if it is an authentication error or a spam issue..

When I configured a microsoft client and was able to send a mail but I did not get it on gmail....

Please could you anyone help me out?

thanks

The original message was received at Fri, 10 Mar 2006 13:11:04 +0100 from [192.168.0.101]

----- The following addresses had permanent fatal errors ----- <gshobowale@xxxxxxxxx>

(reason: 550 found in sbl-xbl.spamhaus.org)

----- Transcript of session follows -----

... while talking to isp.org.:

>>> DATA

<<< 550 found in sbl-xbl.spamhaus.org

550 5.1.1 <gshobowale@xxxxxxxxx>... User unknown

451 4.4.1 reply: read error from isp.org.