Microsoft has launched High Volume Email for Exchange Online in public preview, with free access until May 2026 for organizations sending high-volume email.

Microsoft confirms Exchange Online error misclassifying legitimate emails as phishing threats.

Microsoft announced today that inbound SMTP DANE with DNSSEC for Exchange Online, a new capability to boost email security and integrity, is now generally available. The company announced in September ...

Missing emails? Exchange Online is tagging legitimate messages as spam - here's what to do ...

Microsoft has confirmed that a faulty anti-phishing detection rule designed to stop credential theft campaigns mistakenly ...

Microsoft says an Exchange Online issue that mistakenly quarantined legitimate emails last week was triggered by faulty heuristic detection rules designed to block credential phishing campaigns.