Smtp 服务器默认超时
Smtp Server default timeout
如果目标邮件服务器暂时关闭，我自己的邮件服务器会在放弃之前继续重试发送邮件多少时间？如果 RFC 中提到了默认超时值（我无法弄清楚），我很想知道它。
Sendmail documentation in Message timeouts sections references RFC1123
Requirements for Internet Hosts -- Application and Support
...
5.3.1 SMTP Queueing Strategies
...
5.3.1.1 Sending Strategy
... Retries continue until the message is transmitted or the sender gives up; the give-up time generally needs to be at least 4-5 days. ...
如果目标邮件服务器暂时关闭，我自己的邮件服务器会在放弃之前继续重试发送邮件多少时间？如果 RFC 中提到了默认超时值（我无法弄清楚），我很想知道它。
Sendmail documentation in Message timeouts sections references RFC1123
Requirements for Internet Hosts -- Application and Support
...
5.3.1 SMTP Queueing Strategies
...
5.3.1.1 Sending Strategy
... Retries continue until the message is transmitted or the sender gives up; the give-up time generally needs to be at least 4-5 days. ...