Does exchange use port 587?
Regardless of the FQDN value, if you want external POP3 or IMAP4 clients to use this connector to send email, the FQDN needs to have a corresponding record in your public DNS, and the TCP port (587) needs to be allowed through your firewall to the Exchange server.
What is the IMAP server for Microsoft Exchange?
Settings users use to set up POP3 or IMAP4 access to their Exchange Online mailboxes
| Protocol | Server name | Port |
|---|---|---|
| POP3 | Outlook.office365.com | 995 |
| IMAP4 | Outlook.office365.com | 993 |
| SMTP | Smtp.office365.com | 587 |
What ports does Exchange use?
Port Number
| Port Number | Microsoft Exchange Server Listens for |
|---|---|
| Port 143 | Incoming connection requests from IMAP4 clients, for message download and retrieval |
| Port 25 | Incoming SMTP messages to Internet Mail Connector and Internet Mail Service |
| Port 80 | Incoming connections from Microsoft Outlook Web Access Server |
How do I find my IMAP server for Exchange?
Find your Exchange mailbox server settings In Outlook Web App, on the toolbar, select Settings. > Mail > POP and IMAP. The POP3, IMAP4, and SMTP server name and other settings you may need to enter are listed on the POP and IMAP settings page.
How do I connect to Microsoft Exchange Server?
On the Tools menu, select Accounts. In the left pane of the Accounts dialog box, select the account. Choose Advanced, and then select the Server tab. Under Microsoft Exchange and Directory service, select the Use SSL to connect check boxes.
Is port 993 UDP or TCP?
Service Name and Transport Protocol Port Number Registry
| Service Name | Port Number | Transport Protocol |
|---|---|---|
| imap | 143 | tcp |
| imap3 | 220 | tcp |
| imap3 | 220 | udp |
| imaps | 993 | tcp |