Unable to send, 'your envolope sender domain must exist' (#5.7.1), when sending from Outlook and OE
Posted on 2006-10-19
I have a client who is unable to send emails from her machine. I have set her email account up in both outlook and outlook express and get the same error:
The message could not be sent becuase one of the recipients was rejected by the server. The rejected e-mail address was 'firstname.lastname@example.org'. Subject 'test', Account: 'mail.netcom.uk.net', Server: 'mail.netcom.uk.net', Protocol: SMTP, Server Response: '552 sorry, your envolope sender domain must exist (#5.7.1)', Port: 25, Secure(SSL): No, Server Error 552, Error Number: 0x800CCC79
I have set her account up on our test machine and it works perfectly so i'm assuming that its a problem with her PC. I have tried removing and re-installing Office and error still remains.
Any assistance would be appreciated.
Thanks in advance, Mark.