Email encryption in transit

Many email providers don’t encrypt messages while they’re in transit. When you send or receive emails with one of these providers, these messages are as open to snoopers as a postcard in the mail.

A growing number of email providers are working to change that, by encrypting messages sent to and from our services using Transport Layer Security (TLS). When an email is encrypted in transit with TLS, it makes it harder for others to read what you’re sending. The data below explains the current state of email encryption in transit.

How much email was encrypted in transit?

Generally speaking, use of encryption in transit increases over time, as more providers enable and maintain their support. Factors such as varying volumes of email may explain other fluctuations.

Outbound

Messages from Gmail to other providers.

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  • View Past
  • 30 days
  • 90 days
  • 1 year

Inbound

Messages from other providers to Gmail.

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  • 30 days
  • 90 days
  • 1 year

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Who supports encryption in transit

Below is the percentage of email encrypted for the top domains in terms of volume of email to and from Gmail, in alphabetical order.

Select Region
 

Top domains by region, inbound

Domain %

Top domains by region, outbound

Domain %

Explore the data

Search any domain (e.g. “example.com”) or string (e.g. “de”) to see how much of the email exchanged with Gmail is encrypted in transit. Or download the full dataset.

Region Domain Outbound % Inbound %

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We only report on domains with which Gmail exchanges a large volume of email – so if you didn't find something that you were expecting to find, it may be because the volume is too small.

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