Wikipedia
Dotmailer
dotmailer (DOTD) is an online marketing company listed on the Alternative Investment Market (AIM) of the London Stock Exchange as dotDigital Group PLC. It is an email service provider, and in 2015 is the UK's largest email marketing automation provider with a capitalization in 2015 of about £100m.
The company headquarters is at No. 1 Croydon, with offices in London, New York, Manchester and Edinburgh.