Check the login call in logmatic:
In the login calls the email is hashed.
The contact_field_value stroes the hash
The contact_field_id shows which field it is looking for in suite (email is 3)
To check if the right email was passed in the login call u should hash the email in suite and match it with the login call's log from logmatic:
In mySQL query the contact table with the sha2() function (the string emarsys is concatenated to the email):
select id,_3,sha2(concat('emarsys',_3),256) from [customerID]_contact_0 where id in ([contactID]);