E-mail is a time-tested protocol that needs no introduction. A personal mail server will provide special privacy for all correspondence and is useful for registering in online services and personal correspondence, especially for [Delta.Chat]({{< ref "delta-chat.md" >}}).
Use aliases for questionable services or one-time needs.
Messages for `user+alias@domain.com` will go to `user@domain.com`. It can be useful for spam origin analysis if a unique alias is used for each online service when registering.
For example, `bank+user@domain.com`, `cryptoexchenge+user@domain.com`, and so on.
#### Directory Filter
Create directories of filters for different purposes. This will help protect against phishing and clogging your inbox.
The message for `user-dir@domain.com` will create a `dir` directory in the `user@domain.com` mailbox and all mail will arrive in the `dir` directory.
Examples:
-`user-w@domain.com` - for registering with web services
- Beware of phishing (fraudulent emails), it can rob you of your savings and control over your digital life.
## Sending email does not work
Sending email may be blocked by your ISP, this is often the case with new accounts on Hetzner for example.
To solve this problem, we suggest you send an email to your hosting provider's support with an example [similar to ours](THERE SHOULD BE AN EMAIL EXAMPLE).
