The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'email@example.com'. Subject 'Re: from websoluton', Account: 'mail.websolution4u.co.uk', Server: 'mail.xxx.co.uk', Protocol: SMTP, Server Response: '550 5.7.1 <firstname.lastname@example.org>... Relaying denied. Proper authentication required.', Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC79
i have enabled these 3 options from Sendmail.mc
TRUST_AUTH_MECH(`DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
after that when i am sending email from outlook to External email address,
i am getting the above error message
is there anything i need to know ??