I’m currently running Yosemite beta 10.10.5 (14F6a) but have had some crashing upon quitting Mail for the past couple months.
I see two log items in Console and I’m not sure is they are causing the problem. Any insight is appreciated:
7/26/15 4:34:10.566 PM SpamSieve: Extra preferences file should probably be deleted: /Users/scott/Library/Preferences/com.apple.mail.plist
7/26/15 4:34:11.510 PM mdworker: (Import.Normal:1288) Using too many resources after 256 files (wired: 0 resident: 399144 swapped: 2 regions: 1141), hit usage threshold importing /Users/scott/Library/Mail/Bundles/SpamSieve.mailbundle/Contents/Resources/LeopardTrainSpam.scpt, exiting to clean up now.