E-Mail address validation (Multiple contacts per cell)

[Ben85]

I am looking for a solution , but starting cell B2 I have a group of contacts to be e-mailed that needs to be checked for proper format.

COLUMN A	COLUMN B
AREA (A1)	E-MAILS (B1)
Inspection	'test@abc.com; ab@abc.com; abc@abc.com;
Machining	'abcd@abc.com; abcde@abc.com;

Thanks for any help on the matter.