Over 90% of cyber attacks start with an email. Nostra layers advanced filtering, impersonation protection and encryption over your mail — stopping phishing, malware and invoice fraud before they reach the inbox.
Support from Dublin, Cork, Galway and Belfast — never outsourced.
And 98% client retention that speaks for itself.
Independently audited service delivery, every year since 2021.
Real-time dashboards and measurable commitments.
It provides a baseline, but layered protection substantially improves catch rates for phishing, impersonation and zero-day attachments — the attacks that actually get through.
Attackers impersonate suppliers or executives to redirect payments to their own accounts — impersonation protection and payment-change procedures are the defence.
Standards that stop criminals sending email that appears to come from your domain — we configure and monitor them as standard.
Managed cybersecurity services from Nostra — layered protection, 24/7 monitoring and compliance from SonicWall's Partner of the Year.
Learn more →SOC-as-a-Service from Nostra — 24/7 security analysts monitoring, triaging and responding to threats across your environment.
Learn more →Managed SIEM from Nostra — centralised security logging, correlation and alerting, tuned and monitored by experts. Compliance-ready reporting.
Learn more →Written by the Nostra team | Reviewed October 2026
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