Increase the character limit for SMIMEA DNS records

Hi all,

I propose to increase the character limit for SMIMEA DNS records to accommodate full certificates.

For SMIMEA it is not sufficient to just publish the certificate hash (like TLSA) but the full certificate is necessary, as with SMIMEA you also have a discoverability problem when writing an encrypted email to someone. Then your email client needs to discover the certificate of the recipient, thus the full certificate is usually necessary in DNS.

For example records see eg. https://greatdane.io/dnssec-validation-not-required/

Kind regards,
Christoph

Discussion of this feature here, Error when creating SMIMEA record with full cert (Code: 81041)