this post was submitted on 29 Nov 2025
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Joplin

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Hi,

I set up a Joplin Server on Docker om my Synology NAS. Unfortunately I can't sent any email

Here is the mailing part of my Docker Compose

Spoiler


MAILER_ENABLED: ssl MAILER_HOST: server.provider.net MAILER_PORT: 465 MAILER_SECURITY: true MAILER_AUTH_USER: xxx@example.com MAILER_AUTH_PASSWORD: totallysecure MAILER_NOREPLY_NAME: Joplin Server MAILER_NOREPLY_EMAIL: xxx@example.com

In the logs I can find this

Spoiler


[error] EmailService: Could not run maintenance: Error: Could not initialize transporter. Service will be disabled: Greeting never received

23:39:30 1|app | at SMTPConnection._formatError (/home/joplin/packages/server/node_modules/nodemailer/lib/smtp-connection/index.js:809:19)

23:39:30 1|app | at SMTPConnection._onError (/home/joplin/packages/server/node_modules/nodemailer/lib/smtp-connection/index.js:795:20)

23:39:30 1|app | at Timeout. (/home/joplin/packages/server/node_modules/nodemailer/lib/smtp-connection/index.js:729:22)

23:39:30 1|app | at listOnTimeout (node:internal/timers:569:17)

23:39:30 1|app | at processTimers (node:internal/timers:512:7) {

23:39:30 1|app | code: 'ETIMEDOUT',

23:39:30 1|app | command: 'CONN'

23:39:30 1|app | }

Any Ideas?

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[โ€“] fastfinge@rblind.com 2 points 2 weeks ago (1 children)

The connection to the SMTP server is timing out. Are you sure the port and SSL config is correct?

[โ€“] kachelkaiser@feddit.org 1 points 2 weeks ago

Yes this is correct. It works using betterbird with the same settings.