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Outbound email matching this condition will be rejected to address a recent trend that we've not otherwise been able to capture: "Has text part encoded in base64 that does not contain any 8bit characters."
@jordanhansen Forgot to reply and say should have been resolved shortly after. Everyone hitting it was just whitelisted, best short term solution.
@mxroute I think this is affecting me as of this morning. I'm getting this error:
SMTP error from remote mail server after end of data:
554 5.7.1 Outbound spam message rejected
I'm sending out a CSV attachment to paying customers with nodemailer. Is there a different way I should be attaching the messages?