Email clients

Several Major ISPs and email clients support structured email already today. With forthcoming standardization efforts, this list is likely to grow further.

Desktop

Client	Status
KMail	✅ Supported
Thunderbird	🚧 Under development (Note)
Outlook	🚧 Under development

Mobile

Client	Status
FairEmail	Support planned
Outlook Mobile	🚧 Under development
Thunderbird Mobile (K9)	🚧 Under development (Note)

Webmail

Client	Status
Cypht	Support planned
Mox Webmail	Support planned
Nextcloud Mail	✅ Supported
Roundcube	✅ Supported
SnappyMail	Support planned
OpenXchange	🚧 Under development
Outlook Web App (OWA)	🚧 Under development
Zimbra	🚧 Under development

Vendor-specific clients

Vendor	Status
AOL	✅ Supported
Gmail	✅ Supported
GMX	✅ Supported
Yahoo	✅ Supported
WEB.DE	✅ Supported
Zoho Mail	✅ Supported

See Schema.org for Email for details.