How can I add a custom SMTP mail header to alert emails

[raoul]

How would I go about adding a custom SMTP mail header to alert emails?

We are making use of SendGrid and I would like to be able to use their "category" feature to track emails related to different use cases.

Ideally I'd like NOT to customise the Python script used to send emails.

[dstoev]

@raoul , were you able to find a way without modifying the python script? I need to do the same, but for AWS SES and their custom header X-SES-CONFIGURATION-SET

[to4kawa]

sendmail

we can use only subject.

[NOCSSMS]

Hello,

Based on the previous reply I take it that sending custom email header fields (so that the email could be easily sorted at the destination) is not possible?

I can see that the alerts that are sent out do have some custom fields:

X-Splunk-Name: coldStart
X-Splunk-Owner: administrator
X-Splunk-App: search
X-Splunk-SID: rt_scheduler__administrator__search__coldStart_at_1612254002_2618.10
X-Splunk-ServerName: splunk
X-Splunk-Version: 8.0.3
X-Splunk-Build: a6754d8441bf

I'd like to also expose variables/field names used in the search, for instance.

I agree, this would work only for alerts for each event.

Any suggestions how this could be done?