(Mailgun) Invalid login: 535 Authentication failed

Developer help Self-hosting
1

Trying to set up transactional emails and after searching through the forum, none of the solutions seem to be doing it for me.

I am 99% sure the pass is ok, using the one generated after clicking “reset”.

[2024-02-16 17:00:17] ERROR "POST /ghost/api/admin/invites/" 500 159ms

NAME: EmailError
CODE: EAUTH
MESSAGE: Error sending email: Failed to send email. Reason: Invalid login: 535 Authentication failed. Please check your email settings and resend the invitation.

"mail": {
    "from": "'Website Team' <team@mg.website.org>",
    "transport": "SMTP",
    "options": {
      "service": "Mailgun",
      "host": "smtp.eu.mailgun.org",
      "port": 587,
      "secure": false,
      "requireTLS": true,
      "auth": {
        "user": "postmaster@mg.website.org",
        "pass": "xxxxxxxxxxxxxxxxxxxxxxxx-xxxxxxxx-xxxxxxxx"
      }
    }
  }

./swaks --auth --server smtp.eu.mailgun.org:587 --au postmaster@mg.website.org --ap xxxxxxxxxxxxxxxxxxxxxxxxx-xxxxxxxx-xxxxxxxx --to my@email.com --h-Subject: "hello" --body 'testing some mailgun'

=== Trying smtp.eu.mailgun.org:587...
=== Connected to smtp.eu.mailgun.org.
<-  220 Mailgun Influx ready
 -> EHLO website-ubuntu-16.04
<-  250-8ce7d78dcfb4
<-  250-AUTH PLAIN LOGIN
<-  250-SIZE 52428800
<-  250-8BITMIME
<-  250-SMTPUTF8
<-  250-PIPELINING
<-  250 STARTTLS
 -> AUTH LOGIN
<-  334 VXNlcm5hbWU6
 -> cG9zdG1hc3RlckBtZy5jaW5lbWFob2xpY3MucnU=
<-  334 UGFzc3dvcmQ6
 -> YzA3ODhjMTg3ZDAxNWQ0ODk5ZWZkZTBiZDM5ZjRhZjItOTg1YjU4ZjQtZjY4YjhhNTI=
<** 535 Authentication failed
 -> AUTH PLAIN AHBvc3RtYXN0ZXJAbWcuY2luZW1haG9saWNzLnJ1AGMwNzg4YzE4N2QwMTVkNDg5OWVmZGUwYmQzOWY0YWYyLTk4NWI1OGY0LWY2OGI4YTUy
*** Remote host closed connection unexpectedly.
2

You’re using the eu version of Mailgun’s domain. Are you registered for an EU account with them? If not, that might be your problem.

3

I wasn’t aware that was an option, unfortunately.
I’m in EU, so I assumed I was supposed to set up an EU domain.

4

IIRC, you choose the regio n when setting up the domain, so check the Mailgun dashboard.

In addition, you can check the connection using telnet or swaks tool. Search the forum for usage.

5

Right! It’s EU, because I chose the region as EU.
re: swaks - do you think there’s anything wrong with attached swaks log in the opening post?

6

Double check your credentials.