[Mailer] Add configuration for dkim and smime signers#58501

fabpot merged 1 commit intosymfony:7.3symfony/symfony:7.3from

eliasfernandez:bugfix/53941-dkim-and-smime-signer-as-configurationeliasfernandez/symfony:bugfix/53941-dkim-and-smime-signer-as-configurationCopy head branch name to clipboard