Synology/SMTP Unable to send email

Help
1

Hello everybody,

I’m really new to Vautwarden, and I’m trying to setup my SMTP settings (admin panel and environment variables).

For now I’ve tried a lot of setups, but I’m always getting a SMTP timeout error (504).

For some context, I’m running Vaultwarden on my Synology NAS. I already tried to setup with my personal domain, a Outlook account and a Gmail account, always with the same result 504.

My own domain (the default setup, from the container env var.):
personal setup

Do you see anything wrong with this settings? Maybe I’m missing something?

Thanks in advance for all the help,

Best regards,
Marc

2

Hello to all,

I’m doing some other tests (this time with Gmail), I have some news but still unable to make it work. Here are my settings:

  • host: smtp.gmail.com
  • secure SMTP: checked
  • force TLS: unchecked
  • port: 587
  • from address: my gmail address
  • from name: Vaultwarden
  • Username: my gmail address
  • password: my gmail APP password
  • SMTP Auth mechanism: empty
  • SMTP connection timeout: 30 (or 60)

When doing this setting, I’m getting 2 kinds of errors:

  • if SMTP connection timeout = 60 => Undefined
  • if SMTP connection timeout = 30 => SMTP Connection error: Cannot assign requested address (os error 99)

Thanks again for the help,

Best regards,
Marc

3

I’m not using Gmail but all the settings you have match mine except I have “plain” as the SMTP auth mechanism, including the quotes. I also have Accept Invalid Certs ticked. I set these up in the admin webpage.

4

Can the Nas send its own emails ok?

5

Hello daveymg,

Thanks for the reply. Since yesterday I’ve tried a lot of possible combinations, (plain, login, both, …, invalid certs checked and unchecked), but I’m always getting the same error 99 (timeout = 30).

What do you mean by “The NAS can end its own emails”?

On my Synology (DS218+) I have the Mail Plus server/ client installed, and I use it mainly as a pop client fr my personal domain account, where I can send mails using it’s SMTP setup.

I didn’t managed to make it work, so I decided to also try Gmail…

EDIT : I did retry my personal domain email, but there I’m getting error 400 Bad Request. I submit a help ticket with them, I’ll keep you posted

6

Ok, I found.
It was actually related to the fact that Vaultwarden use a bridge network on Synology. I had to add a firewall rule on the NAS to allow the bridge IPs (https://community.synology.com/enu/forum/1/post/142221?reply=469097)