Invite emails fail in 1.14.x – "Email missing required fields" despite valid SMTP config #398

New Issue

MrUnknownDE · 2026-04-05T17:08:46+02:00

MrUnknownDE commented

2026-04-05 17:08:46 +02:00

Originally created by @Seanluc17 on 1/7/2026

Describe the Bug

In Pangolin 1.14.1, invitation emails are not sent even though SMTP is correctly
configured and verified to be working.

When inviting a user via the UI, Pangolin reports that the email was sent,
but no email is delivered. The SMTP provider (Resend) does not receive any request.

Pangolin logs show an error indicating missing email fields, although all required
fields are configured.

Log output:
[error]: Email missing required fields {"to":"user@example.com","subject":"You're invited to join MyOrganization"}

Additional notes:

SMTP connectivity was verified manually using swaks inside the container.
Resend domain is fully verified (SPF, DKIM, MX).
Sending test emails via swaks succeeds.
No request appears in Resend logs when Pangolin sends invites.

Environment

Pangolin version: 1.14.1 (Docker image: fosrl/pangolin:latest)
Deployment: Docker Compose
Email provider: SMTP (Resend)
Operating system: Linux (Hetzner VPS)

To Reproduce

Configure SMTP in config.yml:

email:
enabled: true
provider: smtp
from: "Bruchtal noreply@mydomain.com"
smtp:
host: smtp.resend.com
port: 587
secure: false
user: resend
pass:
Start Pangolin 1.14.1
Log in to the UI as admin
Invite a new user via the UI

Expected Behavior

The invited user should receive an invitation email.

*Originally created by @Seanluc17 on 1/7/2026* ### Describe the Bug In Pangolin 1.14.1, invitation emails are not sent even though SMTP is correctly configured and verified to be working. When inviting a user via the UI, Pangolin reports that the email was sent, but no email is delivered. The SMTP provider (Resend) does not receive any request. Pangolin logs show an error indicating missing email fields, although all required fields are configured. Log output: [error]: Email missing required fields {"to":"user@example.com","subject":"You're invited to join MyOrganization"} Additional notes: - SMTP connectivity was verified manually using swaks inside the container. - Resend domain is fully verified (SPF, DKIM, MX). - Sending test emails via swaks succeeds. - No request appears in Resend logs when Pangolin sends invites. ### Environment Pangolin version: 1.14.1 (Docker image: fosrl/pangolin:latest) Deployment: Docker Compose Email provider: SMTP (Resend) Operating system: Linux (Hetzner VPS) ### To Reproduce 1. Configure SMTP in config.yml: email: enabled: true provider: smtp from: "Bruchtal <noreply@mydomain.com>" smtp: host: smtp.resend.com port: 587 secure: false user: resend pass: <valid password> 2. Start Pangolin 1.14.1 3. Log in to the UI as admin 4. Invite a new user via the UI ### Expected Behavior The invited user should receive an invitation email.

MrUnknownDE closed this issue

2026-04-05 17:08:46 +02:00

MrUnknownDE added the stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale labels 2026-04-05 17:08:47 +02:00

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Reference: github/pangolin#398