Line spacing in Mail's message list

Efrem64 wrote:

This is not about line spacing in an email message! With the upgrade to Mac OS 12.2 (Monterey) came Mail 15. It spaces message list entries much further apart than earlier releases. The result, not surprisingly, is far fewer messages visible in the list without scrolling. Is there any way to restore the single-spaced message list as in previous versions? (It would be nice to be able to single-space the mailbox list in the sidebar too, but that doesn't affect my productivity as much.) I'd even go back to an earlier release of Mail if that's what it takes, since the new features of Mail 15.0 aren't important to me.

Locally you can try change font type in Mail Preferences and see if works better for you...

Mail User Guide for Mac - Apple Support

You can file a bug report and or can submit your Apple Feedback directly to the Product Team:

https://www.apple.com/feedback/mail.html

You can always Call Customer Support (800) MY–APPLE (800–692–7753)

or on line Apple Support