To connect to the mailbox, the following data is used, which can be found in the section "Mailboxes»:
mail.adm.tools(used for both incoming and outgoing mail).
110- unencrypted connection.
995- encrypted connection (SSL).
143- unencrypted connection.
993- encrypted connection (SSL).
2525- unencrypted connection.
465- encrypted connection (SSL).
This data is used when setting up a connection to a mailbox in various mail clients and when setting up sending mail via SMTP in popular CMS: