The Natural Philosopher  writes:
> On 20/03/2020 12:26, Richard Kettlewell wrote:
>> The Natural Philosopher  writes:
>>> On 20/03/2020 10:19, Richard Kettlewell wrote:
>>>> Martin Gregorie  writes:
>>>>> Its well-known that the From: header is not used at all to transfer mail
>>>>> from sender to receiver - returned bounces are sent to the Reply-To
>>>>> address.
>>>>
>>>> No, they aren’t. Bounces are sent to the transport-level sender address
>>>> (often called the “return path”).
>>>>
>>> 'envelope from'
>>
>> Yes, that too. Delivery agents often add it as a Return-Path: header as
>> their last act.
>
> No, they do not. Ever.

$ grep -c ^Return-path  ~/mail/saved/2019
1159

--
https://www.greenend.org.uk/rjk/

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