Internet service provider Freeserve has confirmed it may rebrand in a move that could change the email addresses of 2.5 million customers.
Freeserve is considering whether to adopt the name of its French owner Wanadoo, which bought the UK business in December 2000.
That would mean customers changing the ending of email addresses to wanadoo.com during a massive rebranding exercise.
A Freeserve spokesman said the idea was still at an early stage: "There's an intention to do it but we need to find out what the impact will be."