Merge pull request #533 from condy0919/mail #250

Job	Run time
test (ubuntu-latest, 27.2)	39s
test (ubuntu-latest, 28.2)	43s
test (ubuntu-latest, 29.1)	42s
test (ubuntu-latest, 29.2)	35s
test (macos-latest, 27.2)	1m 53s
test (macos-latest, 28.2)	1m 53s
test (macos-latest, 29.1)	2m 26s
test (macos-latest, 29.2)	3m 4s
test (windows-latest, 27.2)	55s
test (windows-latest, 28.2)	1m 4s
test (windows-latest, 29.1)	1m 4s
test (windows-latest, 29.2)	1m 16s
test (ubuntu-latest, snapshot, true)	30s
test (macos-latest, snapshot, true)	2m 7s
	18m 51s

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