ME.COM SMTP SERVER NAME ?

IMAP information for the incoming mail server

• Server name: imap.mail.me.com
• SSL Required: Yes
• If you see an error message when using SSL, try using TLS instead.
• Port: 993
• Username: This is usually the name part of your iCloud email address (for example, emilyparker, not emilyparker@icloud.com). If your email client can't connect to iCloud using just the name part of your iCloud email address, try using the full address.
• Password: Generate an app-specific password.

SMTP information for the outgoing mail server

• Server name: smtp.mail.me.com
• SSL Required: Yes
• If you see an error message when using SSL, try using TLS or STARTTLS instead.
• Port: 587
• SMTP Authentication Required: Yes
• Username: Your full iCloud email address (for example, emilyparker@icloud.com, not emilyparker)
• Password: Use the app-specific password that you generated when you set up the incoming mail server.

Check this: https://support.apple.com/en-gb/HT202304