Emails worked in Docker setup with google's smtp-relay. After 2 upgrades, it's not working anymore (error code 421)

[jon91]

Setup information docker-compose

Describe the bug Initially installed and configured around July of 2022 with version 5.5.2. smtp-relay was used as mailer, with no auth, but limited to the IP of the server. Working great for months and no issues. Upgraded to 5.5.45 in December, and emails stopped coming through. Figured it was a bug, so I emailed them manually. With latest release, 5.5.63, still same issue.

System failed to email invoice xxxx

Expected response code "250" but got code "421", with message "421 4.7.0 Try again later, closing connection. (EHLO) xxx-xxxxxxxxxxxxxxxxxxxxxxxxxx - gsmtp".

To reproduce Steps to reproduce the behavior:

1. Go to invoice
2. Click send

Expected behavior should send email

System failed to email invoice xxxx
Expected response code "250" but got code "421", with message "421 4.7.0 Try again later, closing connection. (EHLO) xxx-xxxxxxxxxxxxxxxxxxxxxxxxxx - gsmtp".

Docker/Kubernetes/Helm:

• Output of docker version:

  
  Client: Docker Engine - Community
  Version:           20.10.23
  API version:       1.41
  Go version:        go1.18.10
  Git commit:        7155243
  Built:             Thu Jan 19 17:32:52 2023
  OS/Arch:           linux/arm64
  Context:           default
  Experimental:      true

Server: Docker Engine - Community Engine: Version: 20.10.23 API version: 1.41 (minimum version 1.12) Go version: go1.18.10 Git commit: 6051f14 Built: Thu Jan 19 17:31:11 2023 OS/Arch: linux/arm64 Experimental: false containerd: Version: 1.6.15 GitCommit: 5b842e528e99d4d4c1686467debf2bd4b88ecd86 runc: Version: 1.1.4 GitCommit: v1.1.4-0-g5fd4c4d docker-init: Version: 0.19.0 GitCommit: de40ad0

[turbo124]

It looks like you are connecting fine, the 421 may indicate gmail is throttling you.

[jon91]

Gmail has a 10,000/day limit on smtp-relay emails. I haven't sent that many in 3 years.

[jon91]

After 2 upgrades, system sends them fine. Don't know what caused and/or fixed the issue

[jon91]

Not seeing any issues anymore, closing