SquirrelMail - web based email.

User administration - set password and forwarding options.

Filter configuration - configure maildrop filters for your mailbox (e.g. spam filtering).

Domain administration - configure mailboxes and aliases for your domains. certificate authority - get the root certificate here, use for SSL/TLS with this mail service.
You may then want to ensure you are accessing this page using SSL/TLS. mail settings - settings for configuring a mail client.

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