Usermin's flagging of emails with respect to spf and dkim (the popup when one clicks on the inverted arrow next to the sender name in the spam folder) could be enhanced:
dkim-signature is currently not visible when an invalid dkim signature is present. It is better if it is always displayed, and indicates whether a dkim signature is found or not, and in case it is there, whether it is valid or invalid.
Similarly for spf: spf record found or not, and matches or not
Usermin's flagging of emails with respect to spf and dkim (the popup when one clicks on the inverted arrow next to the sender name in the spam folder) could be enhanced:
dkim-signature is currently not visible when an invalid dkim signature is present. It is better if it is always displayed, and indicates whether a dkim signature is found or not, and in case it is there, whether it is valid or invalid.
Similarly for spf: spf record found or not, and matches or not