# SSLHandshakeException when attempting to send email

**URL:** <https://forum.inductiveautomation.com/t/sslhandshakeexception-when-attempting-to-send-email/114401>\
**Category:** General Discussion\
**Tags:** scripting\
**Created:** [March 9, 2026, 4:53pm UTC](https://forum.inductiveautomation.com/t/sslhandshakeexception-when-attempting-to-send-email/114401 "2026-03-09T16:53:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wbeyrem](https://avatars.discourse-cdn.com/v4/letter/w/53a042/32.png) [@wbeyrem](https://forum.inductiveautomation.com/u/wbeyrem)\
**Post date:** [March 9, 2026, 4:53pm UTC](https://forum.inductiveautomation.com/t/sslhandshakeexception-when-attempting-to-send-email/114401/1 "2026-03-09T16:53:06Z")

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Hi,  
I have this issue when I'm trying to test sending email notification from [ignition@mg.soylutions.ca](mailto:ignition@mg.soylutions.ca "mailto:ignition@mg.soylutions.ca")

As per the error message is like an issue with the certificate

```python
javax.mail.MessagingException: Could not connect to SMTP host: smtp.mailgun.org, port: 465;
  nested exception is:
  javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

```

Thank you

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [March 9, 2026, 4:59pm UTC](https://forum.inductiveautomation.com/t/sslhandshakeexception-when-attempting-to-send-email/114401/2 "2026-03-09T16:59:08Z")

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This means either your mail server is using a self-signed or corporate root CA certificate, or that something is intercepting your traffic and inserting a corporate root CA certificate, and Ignition doesn't trust that certificate by default because it's not a public CA.

You'll need to add that certificate to Ignition's supplemental certificates: [Security Certificates | Ignition User Manual](https://docs.inductiveautomation.com/docs/8.1/platform/security/security-certificates#adding-security-certificates-into-keystores)

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**Author:** ![wbeyrem](https://avatars.discourse-cdn.com/v4/letter/w/53a042/32.png) [@wbeyrem](https://forum.inductiveautomation.com/u/wbeyrem)\
**Post date:** [March 9, 2026, 5:37pm UTC](https://forum.inductiveautomation.com/t/sslhandshakeexception-when-attempting-to-send-email/114401/3 "2026-03-09T17:37:45Z")

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Thank you Kevin I will try that 🙂