My spam filter (spamassassin) is marking Atlassian mandrill/mandrillapp notifications as T_DKIM_INVALID:
"DKIM-Signature header exists but is not valid"
Please fix your e-mail notification infrastructure.
That's something that needs to go to
a) Your own spam handling team
b) to Atlassian support as a suggestion, after you've tried to fix your spam handing.
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