553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)

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iwlu846ac

Receiving but can not send emails. Please help me fix this problem.

553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
 
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Surya Prasad Vemulapalli

What type of account do you use in Outlook?

This error is usually related to message delivery failure by the server and not sending failure by Outlook. Verify if the outgoing emails are stuck in Outbox or in the Sent items folder.

Possible reasons which may raise this issue:

l Outgoing (SMTP) server not authenticated when it requires authentication

l Incorrect Account settings in Outlook

l Certain domain names blocked by the Internet Service Provider (ISP)

ReferI receive a 550, 553, or relay-prohibited error when sending e-mail messages for additional help.
 
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