com on port 995 for SSL. For IMAP, the server is imap.
How to Change the SMTP Server in Outlook Email Setup
The server address is the gateway that sends your messages through the internet, and specifying the wrong one or missing a setting prevents communication entirely. If port 587 is blocked by your network, you can fall back to port 465, which requires an immediate SSL connection.
If you are using a Microsoft 365 business account, the same address applies. You may need to contact your IT department to whitelist the port or adjust router settings to allow external SMTP traffic.
How to Change the SMTP Server in Outlook Email Setup
The critical detail is the port number: use port 587 for STARTTLS encryption, which is the modern standard. Troubleshooting Connection Tests Open a command prompt and use the "telnet" command to test the port.
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