我想要的有关传入电子邮件的信息会保留在信封中吗？
我遇到一种情况，发送给多个收件人的电子邮件将到达一个邮箱。 我想根据他们的发送对象来检查和处理他们，但我不确定我是否总是拥有正确的信息。
假设我有一个收件人 [email protected] 。 如果有人在电子邮件中密件抄送他，我知道 fred 在他的电子邮件中不会看到任何“收件人：”字段，但我将能够找到 [电子邮件受保护] 在信封中。没问题。
现在，如果 Fred 有一些电子邮件转发服务怎么办？或者假设他要求 gmail 将他在 gmail 收到的每封电子邮件的副本转发到他的 [电子邮件 受保护] 地址。
发送给他的原始邮件可能包含以下内容：[电子邮件受保护]信封上，仍然会在“收件人”中注明：但是一旦 gmail 转发了它，我可以确定我总会找到 [电子邮件受保护] 在信封中作为其旅程的“最后一站”？ [email protected] 这对我来说没有用，你看。
或者我会在（信封中的某处）找到对 gmail 和 domain1 地址的引用吗？
TIA
I have a situation where emails bound for several recipients will arrive in one mailbox.
I want to go through and deal with them according to who they were sent to, but I'm not sure I will always have the correct info.
Suppose I have one recipient [email protected] .
if someone bcc's him on an email, I know that fred will not see any To: field in his email BUT I will be able to find [email protected] in the envelope. No problem.
Now, what if fred has some email forwarding service. Or lets say he asks gmail to forward a copy of every email he receives at gmail on to his [email protected] address.
The original message that was sent to him may have said [email protected] in the envelope, and will still say it in the To: but once gmail has forwarded it, can I be sure I will always find [email protected] in the envelope for the "final leg" of its journey ?
[email protected] it would be no use to me, you see.
Or will I find (somewhere in the envelope) references to both the gmail AND the domain1 addresses ?
TIA
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我相信 MTA 会为转发的邮件添加“Delivered-To”或“X-Forwarded”（或类似的，取决于 MTA）。 To: 标头通常保持原样。
I believe MTAs add Delivered-To or X-Forwarded (or similar, depends on the MTA) for the forwarded message. To: headers usually stay as-is.