HI all, I have setup ed a Mail server and i wanna use a hosting Mail server SMTP (My Mail server service provider) . Configuration in sendmail.cf file every thing seems to be fine. Though i have mentioned in the configuration file SMART host my external mail server IP address it is failing to pick up the mentioned address. # dnl define ('SMART_HOST', ' mail.X.com <http://mail.x.com/>')dnl the following i have given in /etc/mail/authinfo file AuthInfo:<mail.x.com> "U:samuel@xxxxx" "P:<xxxxxxx>" "M:DIGEST-MD5" For authentication I tried giving my mail ID user name and password but it is not accepting it says *User unknown.* i received this in postmaster mail. It calling my internet ISP IP rather to call my hosting mail server ISP IP *I do not understand what authentication is needed for my local mail server to connect to my external mail server ? *please help in this regard i am unable to proceed further. Many thanks in Advance. Regards, *Sam* -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list