Pre-filtering for Incoming Mail

Our incoming mail servers use effective pre-filtering to ensure that the majority of incoming spam is blocked before it reaches our central mail systems. This ensures high-performance and reliable processing of legitimate mail traffic and creates the foundation for subsequent content-based filtering.

Spam Check in Detail

After the upstream protection mechanisms, incoming emails are analyzed by Rspamd as an integral part of our mail system to detect spam and phishing attempts. Rspamd evaluates messages based on a wide range of criteria, including message content, header information, sender reputation and technical checks such as SPF, DKIM and DMARC.

The results are combined into a transparent score, which determines whether an email is marked, moved to the spam folder or rejected.

Individual Fine-tuning

Since the type and volume of spam, as well as individual requirements for email filtering, vary from user to user, you can adjust the sensitivity of spam detection to suit your needs. Predefined levels such as low, standard and high are available via the DCP. In addition, blacklists and whitelists can be maintained to further refine filtering behavior.

Virus Protection

All incoming emails are scanned for malware by ClamAV by default. Detected viruses or malicious attachments are reliably removed before delivery, preventing these emails from reaching your systems in the first place. This approach significantly enhances the overall security of the mail system and helps reduce risks in day-to-day operations.

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