2048 bits DKIM Public Key
Some servers start to take reputation away from emails signed with 1024-bit DKIM keys.It would be nice to extend the functionality and allow 2048 bit DKIM keys
Florian Beese commented
It would be great, if this topic can get priority soon. We just encountered issues with mail delivery to Microsoft 365 Exchange servers. All emails sent via Mailjet have been marked as spam. We assume this may be the issue. Once a mail is moved from Spam to the inbox, the sender gets a better rating at MS, so that further emails are not listed as spam. But this is not a solution for our customers.
Also this issue downrates our rating on mail-tester.com significantly. See also this serverfault post, which has the same issue:
Chris Heard commented
Support for 2048 bit DKIM keys. - Now days many org need 2048 bit DKIM key as org policy and can not add mailjet DKIM keys in DNS as Mailjet doesnt support 2048 bit DKIM keys. kindly provide support for 2048 bit DKIM keys.
Yes, please, DMARC doesn't work because of that.