[MlMt] Encrypting with key different from receivers-address

[Niels Kobschätzki]

On 18 Jun 2014, at 12:28, Luca Allodi wrote:

> I think if that was a feature, it would pretty much be malpractice? Arbitrary manipulation of key assignments is not specifically allowed in RFC 4880 (openPGP's), although it is possible to transfer public keys to different user packets.

Is it disallowed? Someone explained to me that he needs it because he has an older key which he personally verified but is from an older mail-address.

> The easiest and most consistent way for you to achieve this would be, I think, to duplicate a at b.org's entry in your GPG keychain by assigning to a new ID c at d.org the same public key as a at b.org.

Why would I need to do this?
After all I encrypt with the public from the counterparty and the counterparty only can decrypt it with her fitting private key.

>> 11.1 Transferable Public Keys
>> [....]
>> Each of the following User ID
>> packets provides the identity of the owner of this public key.  If
>> there are multiple User ID packets, this corresponds to multiple
>> means of identifying the same unique individual user; for example, a
>> user may have more than one email address, and construct a User ID
>> for each one.
>
> That said, I am not an expert on openPGP compliance. :-)

But that would be more like the counterparty attaches multiple user IDs to one key, nothing I could do for the counterparty. But since I know that the key from a at b.org belongs to the same person that has c at d.org I do not see, why I shouldn't be allowed to encrypt with the key from a at b.org

Niels

> On 17 Jun 2014, at 14:43, Niels Kobschätzki wrote:
>
>> Hi,
>>
>> I want to send a mail to someone who has two addresses: a at b.org and c at d.net (just examples). I have a public key for a at b.org and want to send an encrypted mail with this key to c at d.net. How do I do this with Mailmate. I know that it is usually possible with GPG, but how to do it in Mailmate?
>>
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