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Email Infrastructure

Our comprehensive email infrastructure utilises sophisticated techniques in order to ensure a maximum degree of protection against spam email and viruses. Virtualisation enables maximum reliability and the seamless scaling of the performance.

Efficiency

Every email is subjected to a quick and simple test before the analysis in our sophisticated testing procedure is performed. In this manner, resources are preserved, building the foundation for an efficient email system.

The first test is carried out while the communication with the mail server, which is sending the email, is performed. The subsequent second testing step analyses the email in closer detail.

Ensuring the delivery

Customers, who have email accounts with our company, have access to all emails that have passed through the first rough testing. In this manner, any possible important emails – that have been filtered out during the second testing – can be manually selected without the necessity of great efforts. However, the customer can also choose for the deletion of all emails, which are suspected to be spam.

The testing procedure

In detail, the testing procedure is performed as follows:

First step (before queue)

  1. SMTP validation
    Verification, whether the sender has adhered to the mainfeatures of the SMTP protocol. If the sender does not identify himself in accordance with the protocol, the email is rejected (RFC 821).
  2. Mailbox testing
    Verification, whether the address of the recipient exists and is active.
  3. Greylisting
    E-mails from still unknown mail servers are generally refused with a temporary rejection and a note of the sender is made. A mail server, which is standard compliant, will repeat the delivery after a brief period. The delivery is allowed the second time. Nearly 90% of the spam can be refused with this method.
  4. Virus protection
    The virus filter checks the entire content of the received email in regard to viruses and malware.

Second step (after queue)

  1. Spam protection
    Various testing procedures are utilised in order to classify an email as exactly as possible. The most important procedures are the following:
    • Statistical classification procedures
    • Checking against a multitude of black lists (RBLs),
    • Structural testing (structure of the email, analysis of the header),
    • Comparison with known text patterns of spam messages,
    • Testing, whether the email was already identified as a spam message by a third party.
    Depending on how many criteria the tested email meets, it will receive a higher or lower score. This expresses the probability whether the message is a spam email.
  2. Delivery
    The user can freely choose according to which score the message is treated as a spam email. Additionally, it can be chosen whether an email, which is qualified as a spam email, receives a marking or is sent to a separate folder or automatically deleted after one day.

Control panel

E-mail accounts and settings can be easily and comfortably be configured via a web interface. The web interface is based on the most modern Web 2.0 technologies such as Ruby and Ajax.

Secure retrieval and sending

You can retrieve emails via POP and IMAP or through webmailer. All connections can be accessed secured. For sending emails, Nine provides a worldwide accessible SMTP infrastructure with authentification. A smooth mobile usage can also be guaranteed. The SMTP server also supports submission which is important for Swisscom clients, as for them the normal SMTP port is blocked.

Email offers

Take a look on our Email offers.