I have problem with my account, because i can receive email, but i don't send emails, and shows this message:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

lgodoy@fullestack.com INVALID_ADDRESS, ERROR_CODE :550, ERROR_CODE :Requested action not taken: mailbox unavailable

Received:from [192.168.1.17] (190.148.172.173 [190.148.172.173]) by mx.zohomail.com

with SMTPS id 1477714337170895.7029191242107; Fri, 28 Oct 2016 21:12:17 -0700 (PDT)

Message-ID:<9E3E90B4-ACA6-4E8B-8EFD-C77752E1DD5A@fullestack.com>

Date:Fri, 28 Oct 2016 22:12:14 -0600

From:Kevin Boche <kboche@fullestack.com>

User-Agent:Microsoft-MacOutlook/f.15.1.160411

To:<lgodoy@fullestack.com>

Subject:prueba

Content-Type:multipart/alternative;

boundary="B_3560537535_596954866

I hope your prompt respose about it!

Thank you and Regards.