Revert "换个邮箱测试"

This reverts commit 0534cebec368f0228b33449d58ee426f9dcf3030.
Revert "Revert "Revert "之前测试代码错了，修改下"""

This reverts commit 65f490b7dfad5c4aa07e2471c25f10bbd105ca2f.
Revert "Revert "Revert "测试下是否同时发两封"""

This reverts commit ea4a37dc41cd2f28b51ced077a731cab17a3ffb1.
解决发两封的bug