white-space-collapse
Controls how white space inside an element is collapsed.
Outlook
Windows
2013
2016
2019
2021
Windows Mail
2024-09
macOS
2024-09
Outlook.com
2024-09
iOS
2024-09
Android
2024-09
Mozilla Thunderbird
macOS
2026-02
Windows
2026-02
Fastmail
Desktop Webmail
2024-09
HEY
Desktop Webmail
2024-09
LaPoste.net
Desktop Webmail
2026-02
GMX
Desktop Webmail
2026-02
iOS
2026-02
Android
2026-02
1&1
Desktop Webmail
2026-02
Android
2026-02
Mail.ru
Desktop Webmail
2024-09
WEB.DE
Desktop Webmail
2026-02
iOS
2026-02
Android
2026-02
WP.pl
Desktop Webmail
2026-02