You noticed that legitimate email are incorrectly blocked as spam by Anti-Spam service and the Track and Trace shows: spam detected heuristically
Email Security.cloud
A false positive spam email is a legitimate email incorrectly given a verdict of spam. This email can be submitted to Broadcom for analysis and filter review.
The tags, “X-Spam-Flag: YES” and “X-SpamInfo: spam detected heuristically,” are appended to the internet header of emails that are classified as spam by Skeptic Heuristics.
Submit your email false positive sample(s) for analysis, per the article below:
Legitimate email incorrectly blocked as spam by Anti-Spam service Error: "553-Message filtered"