Adding/modifying an external IMAP4 account for retrieval with LANMailServer

Online help for LANMailServer

Inbox Tab

Mailbox Type:	Select IMAP as the mailbox type.
Incoming Mail Server	Enter the IMAP server. This information is provided by your provider and can be a designation such as mail.provider.de or an IP address like 139.54.124.45.
Port	In most cases, the port is 143. You should only change this setting if the provider explicitly informs you that a different port must be used.
Server Requires Secure Connection (SSL/StartTLS)	Enable this setting if the server supports or requires an SSL-encrypted connection.
Number of Connection Attempts	Set how often SuperSpamKiller Pro should attempt to connect to the incoming mail server. In most cases, specifying 1 attempt should be sufficient.
Account Name	Enter the account name/username for the account.
Password	Enter a valid password for the email account.
IMAP Authentication Basic/Standard	Use "Modern Authentication" OAuth2 instead of BASIC/Standard Authentication for accessing mailboxes or sending emails