New guidance on bulk emails

The Information Commissioner’s Office (ICO) is warning organisations to use alternatives to the blind carbon copy (BCC) email function when sending sensitive personal information.

The alert follows a catalogue of business blunders and comes as the ICO publishes new guidance to help organisations understand the law and good practice around protecting personal information when sending bulk emails.

Mihaela Jembei, ICO director of regulatory cyber, said: “Failure to use BCC correctly in emails is one of the top data breaches reported to us every year – and these breaches can cause real harm, especially where sensitive personal information is involved.

“While BCC can be a useful function, it’s not enough on its own to properly protect people’s personal information.

“We’re asking organisations to assess the nature of the information and the potential security risks when deciding on the best method to communicate with staff or customers.

“If organisations are sending any sensitive personal information electronically, they should use alternatives to BCC, such as bulk email services, mail merge, or secure data transfer services.

“This new guidance is part of our commitment to help organisations get email security right. However, where we see negligent behaviour that puts people at risk of harm, we will not hesitate to use the full suite of enforcement tools available to us.”

The critical importance of using appropriate methods to send bulk communications is emphasised in recent ICO enforcement action.

According to ICO data, failure to use BCC correctly is consistently within the top 10 non-cyber breaches, with nearly 1,000 reported since 2019.

Under data protection law, organisations must have appropriate technical and organisational measures in place to ensure personal information is kept safe and not inappropriately disclosed to others.

Those that use and share large amounts of data, including sensitive personal information, should consider using other secure means to send communications, such as bulk email services, so information is not shared with people by mistake.

Organisations should also consider having appropriate policies in place and training for staff in relation to email communications.

For non-sensitive communications, organisations that choose to use BCC should do so carefully to ensure personal email addresses are not shared inappropriately with other customers, clients, or other organisations.