Hello.
Maybe I expressed myself wrong. English is not my native language and I use Google Translate a lot.
I would appreciate it if other SmarteMail users (administrators) who use DKIM signing could confirm if the configuration I am using is the same one they use.
Key size: 2048 (Recommended)
Max messages: 0
Body canonicalization: Relaxed
Header canonicalization: Relaxed
Header fields to use: All non-repeatable fields
Also, if someone uses SmarterMail 8629 (Aug 17, 2023), and has the same configuration that I use for DKIM signing, they could check if they have exceptions in their delivery logs with the following text: "Exception: The list of headers to sign SHOULD NOT include the 'Bcc' header"
I have sent emails that use BCC to dkimvalidator.com and it doesn't seem that SmarterMail includes the BCC header in the DKIM signature, so I don't really understand the exception.
Validation of dkimvalidator.com indicates that it is signed without BCC:
DKIM-Signature: v=1; a=rsa-sha256; d=monmariola.com; s=secure;
c=relaxed/relaxed; t=1694680295;
h=from:to:cc:subject:date:message-id:mime-version:x-mailer:thread-index:
x-declude-sender:x-declude-spoolname:x-declude-refid:x-declude-scan:
x-declude-tests:x-country-chain:x-declude-code:x-declude-recipcount:x-helo:
x-revdns:x-fpreview-weight;
bh=(omited);
Thank you
Miguel Enrique
Mon Mariola, S.L.