When using the SEPPmail Secure E-Mail Gateway for transparent email encryption, administrators occasionally encounter a frustrating phenomenon: recipients receiving unreadable emails, attachments named winmail.dat, or broken calendar entries.
Microsoft has allowed the use of IP-based connectors in Exchange Online to authenticate mail flow. However, as more organizations move toward shared infrastructure, multiple MTA (Mail Transfer Agent) systems, or shared public IP addresses, IP-based authentication has proven to be increasingly unreliable.
SEPPmail has published a software update to fix multiple vulnerabilities. Affected versions: All versions before 15.0.3
DigiCert has released a new CA certificate. Systems that do not automatically update and trust new CA certificates may require manual intervention to prevent service disruption. Email communication may be interrupted if the certificate is not trusted before it is used to sign certificates. As SEPPMail appliances do not update…
Last update: 28. January 2026 In our daily support work we often see FortiGates in use on which the basic settings like time zone, host name and so on have never been set correctly. Therefore we would like to provide you with a small guide on this page, with which…
This summer, SEPPMail is making a significant upgrade to their internal system for licensing and updating SEPPMail appliances. The old system, the License and Update Server, has served us well, but it was time for an overhaul to meet the growing demands for scalability and extensibility. SEPPMail is excited to…
We have some exciting news to share with you today! FortiClient is now available for ARM64 architecture, expanding its compatibility and bringing enhanced security to a wider range of devices.
Last update: 02.02.2026 We are facing a spike in support requests regarding FortiClient VPN and want to share this information with you.
Last Update: 31.12.2025 Spoiler alert: Current FortiOS versions do not allow BGP blackhole routing out of the box. But we have two possible workarounds ready for you.
Since the update to version 14.x, the SEPPmail admin WebGUI displays the message: “To ensure a database snapshot is done every day, an LFT partition is mandatory.” Update from 20.02.2025: SEPPmail has recently added the steps to the official documentation which can be found here: https://docs.seppmail.com/de/09_ht_lft_datadisk_v14.html
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