Few issues with login and SMTP on flatsgo.com

Closed - This job posting has been filled and work has been completed.

Job Description

***1 error ( only from admin to user), from user to admin is fine)
SMTP Error: The following recipients failed:

*** 2 Error
New guests cant sign up or sign in (Only with facebook)
but facebook login is in conflict with ADMIN. It gets signed up with info, from admin

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