I receive mail, I can send local mail, but I can't send mail to other domains.

[vabra]

Here is a part of maillog:

Mar 11 16:53:42 sokol sendmail[245]: i2BBrgV00245: ruleset=check_rcpt, arg1=<vabra at yandex.ru>, relay=vabra [192.168.1.66],
reject=550 5.7.1 <vabra at yandex.ru>... Relaying denied
Mar 11 16:53:42 sokol sendmail[245]: i2BBrgV00245: from=<vabra at sokol.kgn.ru>, size=541, class=0, nrcpts=0, proto=ESMTP,
daemon=MTA, relay=vabra [192.168.1.66]

                          mailto:vabra at sokol.kgn.ru