IMAP
Microsoft to deprecate legacy TLS in Exchange Online starting July
Microsoft says it will start blocking legacy TLS connections for POP and IMAP email clients in Exchange Online starting in July 2026. The Transport Layer Security (TLS) cryptographic protocol protects users’ information from eavesdropping, tampering, and message forgery when accessing email over the Internet via client/server applications. However, the original TLS 1.0 specification and its […]
Microsoft Exchange Online outage blocks access to mailboxes via IMAP4
Microsoft is working to fix an Exchange Online service outage that intermittently prevents users from accessing their mailboxes via the Internet Mailbox Access Protocol 4 (IMAP4). The incident (tracked under EX1215307) began on January 1st at 19:00 UTC, with Microsoft noting that other connection methods are not affected and advising those impacted that retries may help […]
Over 3 million mail servers without encryption exposed to sniffing attacks
Over three million POP3 and IMAP mail servers without TLS encryption are currently exposed on the Internet and vulnerable to network sniffing attacks. IMAP and POP3 are two methods for accessing email on mail servers. IMAP is recommended for checking emails from multiple devices, such as phones and laptops because it keeps your messages on […]