If you are getting an error similar to: The rejected e-mail address was 'xxxx@domain.com'. Subject 'Test via mail.domain.com', Account: 'mail.domain.com', Server: 'mail.domain.com', Protocol: SMTP, Server Response: '550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1)', Port: 26, Secure(SSL): No, Server Error: 550, Error Number: 0x800CCC78 This could be due to incorrect configuration of outlook. Please make sure you have authentication turned on for the outgoing mail. Go to the advanced settings for the outgoing server and enable "Outgoing server requires authentication, use same settings as incoming server" - that should solve the issue. | |
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