The deal will see Sony use Emailvision's ±±¾©Èü³µpk10 Commander software across its European electronics division, which covers 35 countries and five product divisions.
The news comes as Sony reported a £685m loss last year, its first net loss for 14 years, and warned that the global financial crisis would take it even further into the red over the coming year.
Emailvision's software allows Sony to target its customers through a triggered email cycle, based on when they register their product.
A personalised email is sent at timed intervals, such as 30 or 60 days after registration, with specific offers and promotions as well as tips on how to best use the specific registered Sony product.
This approach is designed to encourage return visits to or stores and to ensure customers are receiving personalised communication.
Lauriane De Langhe, Sony's customer information manager for Europe, said: "We have seen the importance of customer relationship management increase dramatically over recent years.
"By targeting existing customers with relevant and personalised information on a regular basis, we have to be sure that we are using the right solutions. Emailvision has strong relationships with all the main global and local ISPs across Europe."
Nick Gold, UK managing director at Emailvision, said: "It is now more important than ever to foster existing relationships with customers by providing them with the right information at the right time.
"Sony is a great example of where email marketing is helping to maximise such relationships and ensure greater marketing success."
Last month Sony appointed HS&P to manage its customer relationship management activity following a pitch.
HS&P will work on the newly-created account comprising of online and offline CRM activity across Sony's UK consumer electronics division.