回帖：不知道是不是证书的原因,今天在TLS验证网站测试时提示以下错误:
[001.425]Cert VALIDATION ERROR(S): unable to get local issuer certificate, certificate not trusted, unable to verify the first certificate
[001.425]This may help: What Is An Intermediate Certificate
[001.425]So email is encrypted but the recipient domain is not verified

Checking lawrence@xxxxxxxx.com:
looking up MX hosts on domain "xxxxxxxx.com"
mail.concordcityx.com (preference:10)
Trying TLS on mail.xxxxxxxx.com[*.*.*.*] (10):
secondstest stage and result
[000.231]Connected to server
[000.463]EHLO checktls.com
[000.694]STARTTLS
[000.926]EHLO checktls.com
[001.658]MAIL FROM:
[001.889]RCPT TO:
[002.905]QUIT
[003.136]