I cannot figure out what’s going on here. Am trying to test email alerting and get the following message.
I’ve tried telnet and its all allowed.
Error: Notification has email recipients and is triggered, but sending emails failed. Sending the email to the following server failed : smtp-relay.gmail.com:587
There are a bunch of posts in the community about sending e-mail via gmail - maybe one of those will help? If you find the answer in them, be sure to post and mark it here since some of those are missing the “Solution”. If you don’t find a solution, let me know what you tried and we can troubleshoot more.
Ach, missed that. is the wording in your original post the exact wording of the error? Where do you see it appearing? Do you see anything coming up in the graylog logs?
perhaps from e-mail address may need to match the auth?
yeah this email is used by various prod firewalls, etc. All able to send email notifications.
So can’t suspect it’s an issue on the gmail replay end.
Not been able to see any logs also puzzles me.
I transferred your settings onto my system and spent the morning coffee playing with it. I was getting the same error and realized it was likely because I had 2FA set up on my gmail account. I went in and generated an app password for gmail which got me through the error only to be blocked by my own firewall rule that only allows e-mail via authorized systems… more change than I am willing to test out. Since you have other systems happily accessing Gmail, this is likely not the solution, but maybe it will jostle some area you have where the fix is?
Thanks for taking time to investigate, much appreciated. though I was going mad. yeah we have done everything from the gmail side, less secure apps enabled, as well as 2fa disabled for this email.
Will prob have to think about what notification method we could use, slack, opsgenie,etc.
or a postfix server
A big facepalm from this end . The issue wasn’t anything to do with Graylog, but a simple password typo.
correcting it worked like a charm… And a big thank you, you last comment, and prompt, and timely response. made me re-check my entire config
Out of courtesy have posted the working config - also if your using gsuite as your IDP, you need to whitelist the IP of the server, ours was in AWS, so Nat Gateway Public IP.
Apps → Google Workspace - > Settings for Gmail → Routing
under SMTP relay service
edit - and add your IP address
playing with it. I was getting the same error and realized it was likely because I had 2FA set up on my gmail account. I went in and generated an 
Since you have other systems happily accessing Gmail, this is likely not the solution, but maybe it will jostle some area you have where the fix is?