No email sending suddenly, DigitalOcean MailJet

Product Support Self-hosting
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AI-generated summary

A user reported that emails suddenly stopped sending from their Discourse instance hosted on DigitalOcean, despite no configuration changes. Sidekiq logs showed connection errors to Mailjet’s SMTP server (in-v3.mailjet.com:587), including EOFError and ECONNRESET. The app.yml configuration appeared correct, and Discourse Doctor offered no solution. pfaffman suggested checking the Mailjet account, while Arkshine recommended reviewing firewall settings and noted Mailjet’s status page showed no outages. Ultimately, anon82911141 confirmed the issue was with Mailjet itself and resolved it by switching to a different email provider.

1

Hi,

All of my emails suddenly stopped sending. No clue how this happened, no changes were made.

Sidekiq:

Jobs::HandledExceptionWrapper: Wrapped EOFError: end of file reached
Jobs::HandledExceptionWrapper: Wrapped Errno::ECONNRESET: Connection reset by peer
Jobs::HandledExceptionWrapper: Wrapped Errno::ECONNRESET: Connection reset by peer - connect(2) for "in-v3.mailjet.com" port 587

3 different emails won’t send, on the dashboard, it says “There are 3 email jobs that failed. Check your app.yml and ensure that the mail server settings are correct. See the failed jobs in Sidekiq.”

app.yml:

env:
  LC_ALL: en_US.UTF-8
  LANG: en_US.UTF-8
  LANGUAGE: en_US.UTF-8
  UNICORN_WORKERS: 4
  DISCOURSE_HOSTNAME: mydomain.com
  DISCOURSE_DEVELOPER_EMAILS: ‘admin@mydomain.com’
  DISCOURSE_SMTP_ADDRESS: in-v3.mailjet.com
  DISCOURSE_SMTP_PORT: 587
  DISCOURSE_SMTP_USER_NAME: usrname
  DISCOURSE_SMTP_PASSWORD: “psword”
  DISCOURSE_SMTP_DOMAIN: mydomain.com
  DISCOURSE_NOTIFICATION_EMAIL: noreply@mydomain.com
  LETSENCRYPT_ACCOUNT_EMAIL: me@example.com

All emails were working until a random point, didn’t make any changes but errors just started.

Discourse Doctor says “Connection reset by peer This is not a common error. No recommended solution exists!”

Would appreciate any help.

2

Check your mailjet account. My best guess is an issue with your account.

3

Hi,

Did you check your firewall settings?

From mailjet side, it seems everything is fine: https://status.mailjet.com/

I would still check if something changed in the configuration.

4

@pfaffman @Arkshine

Thank you to both for your help, turns out it was a problem with Mailjet. Switched to a different mail provider and it’s working fine ever since.

Thanks!