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密码安全提示:

  • 至少使用 6 个字符
  • 字母与数字组合
  • 小写字母与大写字母组合
  • 使用特殊字符(如,@)

Blacklist

Many companies use blacklists to reject inbound email, either at the server level or before it reaches the recipient's inbox. The reasons for blacklisting may be:

  • The email owner requested it.
  • The email has a long history of generating bounces and is recognized as invalid, or unresponsive.
  • The email owner marked your message as spam.

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