STMP dial tcp i/o timeout in Listmonk deploy

candide
HOBBY

a month ago

Version:

  • listmonk: v5.1.0

  • OS: Railway one-click deploy

Description of the bug

Ever since I've upgraded to the latest listmonk instance, my SMTP hasn't been working...

The double opt-in emails haven't been sending, the campaign tests don't work, and the SMTP tests don't work. I've tried with several SMTP providers which work otherwise and that I've been using for the last few years. I've tried the following (digits have been changed to zeros):

Mailersend (port 587):
dial tcp 00.000.00.000:000: i/o timeout

Sendpulse (587):
dial tcp 0.00.000.000:000: i/o timeout

Mailgun (465):
dial tcp 00.000.00.000:000: i/o timeout

Brevo (587):
dial tcp 0.000.000.0:000: i/o timeout

Screenshot:

Image
The Listmonk dev has said:

> This seems like something to do with the Railway environment. The error clearly says that it's a DNS resolution timeout, hmm. Could you please try reaching out to Railway, or if it permits, SSH'ing into the instance and trying to do a traceroute to the SMTP endpoints?

4 Replies

SMTP has been completely disabled on Hobby plan. Please upgrade to PRO or higher.


samgordon

SMTP has been completely disabled on Hobby plan. Please upgrade to PRO or higher.

candide
HOBBY

a month ago

Unfortunately, I can't find any info about this on Google or the pricing page: https://railway.com/pricing

Could you point me to where you found this info?


candide

Unfortunately, I can't find any info about this on Google or the pricing page: https://railway.com/pricingCould you point me to where you found this info?

https://railway.com/changelog/2025-09-05-logs-panel#smtp-is-now-available-for-pro-users

You can use something like Resend to continue sending emails from the Hobby plan.


samgordon

https://railway.com/changelog/2025-09-05-logs-panel#smtp-is-now-available-for-pro-usersYou can use something like Resend to continue sending emails from the Hobby plan.

candide
HOBBY

a month ago

Thanks for the heads-up and link. I don't think Listmonk supports email APIs like Resend at the moment, and switching to a more expensive plan would put my current setup at the same cost as other hosted newsletter options. Looks like I'll have to switch to another service...


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