DKIM implementations

[DorianCoding]

Hello,

I would like to implement DKIM on Rust emails, so SPF and DKIM can be fulfilled and allows better transmission of mails.

Thanks.

[tessus]

May I ask why you want to implement this on the client? By client I mean the mail client. vw server acts as a mail client (unless the sendmail binary is directly used).

DKIM and SPF are usually handled by the mail server. Also, what happens if you use DKIM on the client and then on the server again? Or actually it's worse, when using DKIM on the client but not on the server. The server will add headers that in turn will render the DKIM signature created on the client invalid.
Have you tested all possible combinations?

[BlackDex]

@tessus, sendmail is nothing more then a client in our case. It's how the sendmail is configured which might make it differently

[DorianCoding]

Hello,

Yes I know but some person might use DKIM on their own without their server and it would be wise to allow people to do it if they want to, because the implementation is minimal as you can see. It might not be useful for everyone, I fully agree and if the server already manages SPF/DKIM and so on, there is no need to implement anything more but it might not be the case and people should be able to implement it. I've not tested all combinations but rapid tests shows it can work if people are actually configuring it themselves before and wants to continue.