Existing shareholder Bloomberg Beta has returned to contribute to a $12m series A round that will allow ValiMail to cope with increasing demand for its authentication technology.

US-based email authentication platform ValiMail has raised $12m in series A capital from a consortium featuring Bloomberg Beta, the early-stage investment arm of media company Bloomberg.

Shasta Ventures led the round, while fellow venture capital firm Flybridge Capital Partners also took part.

Founded in March 2015, ValiMail has developed a cloud-based authentication service verifying that emails which appear to have been sent from a company are genuine. Enterprises are also provided with an overview of all email activity to identify…