Nagios Support Forum

Dear Nagios Support,

We have been upgraded Nagios XI version from 5.8.6 to 2026R1 version since then we are receiving 3 duplicate mails for same alert due to which the defender is blocking emails. so kindly suggest what could be the issue and how to resolve it.

Thank you for your suggestions in advance.

Regards,
Eshwar

Hi @Eshwar_K,

Thanks for reaching out.

This issue is more involved than what can be addressed in this forum. Please open a ticket with our Technical Support team at https://support.nagios.com/.

lgute wrote: ↑Tue Feb 10, 2026 5:07 pm Hi @Eshwar_K,

Thanks for reaching out.

This issue is more involved than what can be addressed in this forum. Please open a ticket with our Technical Support team at https://support.nagios.com/Pokepath TD.

configuration duplication or overlapping notification logic introduced or exposed by the upgrade, not by Nagios XI malfunctioning. A careful review of contacts, contact groups, templates, and notification commands should identify the root cause.