Re: undisclosed-recipients

[Uwe Brauer <oub@mat.ucm.es>]

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>>> "AS" == Adam Sjøgren <asjo@koldfront.dk> writes:

> Uwe writes:
>>> I always thought it was added automatically by a MTA somewhere if you
>>> left the To: field blank. I don't think anyone types it in there manually.
>> 
>> Well not gnus.

> Like Eric Abrahamsen, I think that this bogus value
> "undisclosed-recipients" is inserted by Microsoft Exchange, Gmail or
> similar, when there is no To: field.

> To test this, I tried composing an email in the Gmail web-interface with
> two recipients in Bcc: and nowhere else. The resulting emails arrived
> with:

>   From: Adam Sjøgren <[redacted]@gmail.com>
>   Subject: Test Bcc only from Gmail
>   To: undisclosed-recipients:;
>   Date: Sun, 10 Feb 2019 19:06:20 +0100

>   From: Adam Sjøgren <[redacted]@gmail.com>
>   Subject: Test Bcc only from Gmail
>   To: undisclosed-recipients:;
>   Date: Sun, 10 Feb 2019 19:06:20 +0100

> So Gmail inserts the bogus value "undisclosed-recipients:;" in To: when
> you only put recipients in the Bcc field and leave To and Cc empty.

I use gnus and gmail smtp mail server run your experiment and received 

From: Uwe Brauer <blabla@gmail.com>
Subject: test undisclosed
Date: Mon, 11 Feb 2019 20:01:07 +0100 (2 minutes, 3 seconds ago)
Reply-To: Uwe Brauer <blabla@gmail.com>



So no undisclosed-recipients:; is inserted.

Sort of odd?

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