incorrect error message when using wrong prefix

[tricixg]

to duplicate, 1) add a new contact, with a valid email however use the prefix m+/ which is not allowed.

The error message displayed is regarding the email format. However, there is no issue with the email format.

This could lead to confusion as Behavior is not specified and differs from normal expectations (error message does not match the error)

[nus-pe-script]

Your response not required for this bug as the team has accepted the bug as it is.