How to Delete an Outgoing Mail Server in macOS Mail
bring up the Mail app and selectPreferencesunder theMailmenu. grab the account in the left panel for which you want to remove the outgoing mail server. If you’re using an older version of Mail, you won’t see this option. Skip to the next step. Next toOutgoing Mail Server Account, poke the drop-down menu and choose theEdit SMTP Server Listoption. Some older versions of Mail call this theOutgoing Mail Server (SMTP), and the optionEdit Server List....