不发送邮件似乎没办法验证邮箱是有效的吧 最多验证邮箱格式是正确的
可以停留在发邮件的前一步,楼上说的通过MX记录只能验证Mail Domain有效而不能验证Mailbox存在 MX record about utb.cc exists.
Connection succeeded to kr1-aspmx2.worksmobile.com SMTP.
220 mx.worksmobile.com ESMTP Zc-Uk+70RmqJma1vTFAAJQ - nsmtp
> HELO min.kiwi
250 mx.worksmobile.com Pleased to meet you
> MAIL FROM:
=250 2.1.0 OK Zc-Uk+70RmqJma1vTFAAJQ - nsmtp
> RCPT TO:
=250 2.1.5 OK Zc-Uk+70RmqJma1vTFAAJQ - nsmtpMX record about the.cat exists.
Connection succeeded to mail.the.cat SMTP.
220 vm608.entorno.es ESMTP Postfix
> HELO min.kiwi
250 vm608.entorno.es
> MAIL FROM:
=250 2.1.0 Ok
> RCPT TO:
=550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table