经常在网络平台上看到有人给作者评论“乾坤未定，皆是黑马”，这句话有鼓励和自勉的意思，但是并非所有人都能理解。黑马在如今被理解为具有潜力的马，最有可能夺冠的马，但也是在最开始默默无闻并没有那么突出的马，
I have implemented secured login and signup in my website.It working.Now I want to test it.I am not sure how to test whether it is开发者_运维百科 correctly secured.If you want to test whether it break
Is there a way to check user SMTP server credentials without sending email, or connecting to POP/IMAP.
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