[Exim] smtp auth

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Dear lists,

i am trying to manually send email out from my exim without using any email client.

i used telnet xx.xx.xx.xx 25 to connect to the smtp port, then
ehlo
mail fr: <local email>
rcpt to: <external email>

then it return me with "relay not permitted" , is there any way i can get over this ? i saw a AUTH there, how do i use that one ?


thanks
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