https://bugs.exim.org/show_bug.cgi?id=2947
--- Comment #3 from Andre Leroux <[email protected]> --- Here are the two full email headers: (1) Header #1: Exim to Gmail (2) Header #2: Exim to O365 click here (https://www.dropbox.com/t/zQZzVA91ULjbR26p) to download. Password is ' password123 '. Below is my service providers response: --- This appears to be a global issue with cPanel. Here is what cPanel' support department have said regarding the matter: When emails are sent from Exim and received in Outlook, the DKIM signature is invalid. dkim=fail (signature did not verify) Description In Exim, DKIM signed headers are added according to RFC standards. https://www.exim.org/exim-html-current/doc/html/spec_html/ch-dkim_spf_and_dmarc.html When unspecified, the header names listed in RFC4871 will be used, whether or not each header is present in the message. The default list is available for the expansion in the macro “_DKIM_SIGN_HEADERS” and an oversigning variant is in “_DKIM_OVERSIGN_HEADERS”. When the option is left unset, the defaults are used. However, Outlook reports the DKIM signature is incorrect, while many other providers indicate the signature is correct. For comparison, we sent the same email to Hotmail/Outlook servers and Gmail servers. Gmail servers always validated the DKIM as correct, while Outlook servers marked the signature as invalid. We've opened an internal case for our development team to investigate this further. For reference, the case number is CPANEL-37039. Follow this article to receive an email notification when a solution is published in the product. Workaround A workaround is unclear at this time. -- You are receiving this mail because: You are on the CC list for the bug. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
