Solution updated on 20.04.2026, 17:30
SEPPmail has released another statement on their Statuspal website with recommendations to adjust some settings in the MPKI tab of your SEPPmail.
Please check out the article here: CORRECTION: SwissSign – renewal of S/MIME Silver certificates (On Prem)
Originally published information:
SwissSign and SEPPmail have just informed its customers regarding a formal error which affects all S/MIME email certificates that have been issued between July 15, 2025 and April 17, 2026.
Link to the article: Swisssign – renewal of S/MIME Silver certificates
We’re still in contact with SEPPmail for the verification of further steps to remediate this issue and find a way how replacement certificates can be inquired automatically for affected SEPPmail user accounts.
We’ll publish updated informations as soon as we’ll have them. In the meantime please check the status on the SEPPmail Statuspal website or don’t hesitate to raise a support case with us or the vendor to be informed as soon as there’s solution available.
