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Service Name and Transport Protocol Port Number Registry Jul 20, 2020 What ports does MS Exchange use? - Powered by Kayako Help SMTP over SSL. TCP port 465 is reserved by common industry practice for secure SMTP communication using the SSL protocol. However SMTP typically still uses port 25 and use TLS for its security layer: SMTP/LSA: TCP: 691: The Microsoft Exchange Routing Engine (RESvc) listens for routing link state information on TCP port 691. HostKnox :: Email Ports Tutorial There you have the opportunity to choose between SSL/TLS (combined in one option) and STARTTLS. If you select SSL/TLS use the port number for encrypted connection (465, 993, 995). If you select STARTTLS use the port numbers for non-encrypted connection (587, 143, 110). Again, in both cases the connection will be encrypted with TLS. FTPS Port Number(s) — TechExams Community

If you use TLS protocol, set the SMTP Port number as 587 instead of 465 which is the Port number used for SSL. You can also check Hotmail SMTP settings and Yahoo SMTP settings to …

Email client protocols and port numbers – DreamHost Mar 17, 2020 email - What is the difference between ports 465 and 587

What’s an SSL port? A technical guide for HTTPS - GoDaddy Blog

SMTP over SSL. TCP port 465 is reserved by common industry practice for secure SMTP communication using the SSL protocol. However SMTP typically still uses port 25 and use TLS for its security layer: SMTP/LSA: TCP: 691: The Microsoft Exchange Routing Engine (RESvc) listens for routing link state information on TCP port 691. HostKnox :: Email Ports Tutorial There you have the opportunity to choose between SSL/TLS (combined in one option) and STARTTLS. If you select SSL/TLS use the port number for encrypted connection (465, 993, 995). If you select STARTTLS use the port numbers for non-encrypted connection (587, 143, 110). Again, in both cases the connection will be encrypted with TLS. FTPS Port Number(s) — TechExams Community Port 443 is only standard for HTTP over SSL/TLS, not FTP over SSL/TLS. FTPS (explicit) doesn't utilize a special port. The TLS session is setup with the AUTH command (as described in page 4 of RFC 4217) over the traditional command port, 21.