StrongMail acquires digital agencies, forms social mashup unit

OAS_RICH('Middle1'); Redwood City, Calif.-E-mail and social media marketing company StrongMail Systems has acquired two New York-based interactive marketing agencies, rolling them up into a new in-house division that melds e-mail, social marketing and customer-relationship management. StrongMail's acquisitions, Conversa Marketing and Magnetik, offer e-mail, social media marketing and listening, Web design and CRM.