Sendmail 给多个没有抄送的用户

Question

大家好，我想知道是否可以以一种可以在 To: 中串接多个电子邮件地址的方式使用 sendmail

From: sendmail
To: person01@gmail.com;person02@gmail.com
Subject: Did You Both Receive It?

I hope you did

而不是使用

From: sendmail
To: person01@gmail.com
Cc: person02@gmail.com
Subject: Did You Both Receive It?

I hope you did

Answer 1

要将多个地址放在To:orCc:或Bcc:行上，请用逗号（加上可选空格）分隔它们。有些邮件阅读器允许输入分号来分隔地址并显示由分号分隔的地址，但这不是标准语法。

From: sendmail
To: person01@gmail.com, person02@gmail.com
Subject: Did You Both Receive It?

您可以在逗号之后将标题拆分为多行（以及地址中的其他一些地方，但这更棘手）。续行必须以至少一个空格或制表符开头。

From: sendmail
To: person01@gmail.com,
    person02@gmail.com
Subject: Did You Both Receive It?

Answer 2

您可以To:多次使用标题。我对此有点怀疑，但我只是在 SMTP 服务器上尝试了它，它接受了它。

所以，而不是发送...

From: sendmail
To: person01@gmail.com
Cc: person02@gmail.com
Subject: Did You Both Receive It?

I hope you did

...你可以发送：

From: sendmail
To: person01@gmail.com
To: person02@gmail.com
Subject: Did You Both Receive It?

I hope you did

在我的客户端 (Thunderbird) 中，收件人一起出现，如下所示：

To person01 <person01@gmail.com>, person02 <person02@gmail.com>

并且源保持完整（To:s 没有在途中转换）：

To: person01@gmail.com
To: person02@gmail.com

现在，由于 SMTP 服务器允许我发送两条RCPT TO:消息，我假设sendmail也可以这样做。大概是这样的……

$ sendmail "person01@gmail.com,person02@gmail.com" <<EOF
To: person01@gmail.com
To: person02@gmail.com
...

Your message.
EOF