Email sent undeliverable 550 error

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eqiserv Posts 2 Registration date Wednesday 28 June 2017 Status Member Last seen 29 June 2017 - 28 Jun 2017 à 15:19
 Peter - 18 Aug 2022 à 06:02
I receive emails through Outlook with out problems but get undeliverable messages with 550 error when replying and/or sending
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Blocked Profile
28 Jun 2017 à 16:39
You have not set the SMTP server configurations correctly. EVERY ISP has there own SMTP services, and you need to use your ISP to authenticate you! Contact your ISP!

550 Blocked error or 550 Requested action not taken: mailbox unavailable is an SMTP (Simple Mail Transfer Protocol) error code. Put simply, this message means that the email you sent was blocked by the recipient's email hosting server, and returned to you.

Regards,
Peter