# Problem to setup mail with mailgun
**URL:** https://forum.mautic.org/t/problem-to-setup-mail-with-mailgun/32870
**Category:** Mautic 5 Install/Upgrade Support
**Created:** [July 25, 2024, 11:08am UTC](https://forum.mautic.org/t/problem-to-setup-mail-with-mailgun/32870 "2024-07-25T11:08:31Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@ezohiko](https://forum.mautic.org/u/ezohiko)
#### Post date: [July 25, 2024, 11:08am UTC](https://forum.mautic.org/t/problem-to-setup-mail-with-mailgun/32870/1 "2024-07-25T11:08:31Z")
**Your software**
My Mautic version is: 5.0.4
My PHP version is: 8.1.29
My Database type and version is: Mariadb 10.5
**Your problem**
My problem is:
When I try to send a test, I have this message :
Failed to authenticate on SMTP server with username “[xxx@xxx.co](mailto:xxx@xxx.co)” using the following authenticators: “LOGIN”, “PLAIN”. Authenticator “LOGIN” returned “Expected response code “235” but got code “535”, with message “535 Authentication failed”.”. Authenticator “PLAIN” returned “Expected response code “235” but got empty code.”.
I try from cli with swaks, it works.
My DSN : smtp://xxx@xxx.co:SECRET@smtp.eu.mailgun.org:587?encryption=tls
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### Author:  [@ezohiko](https://forum.mautic.org/u/ezohiko)
#### Post date: [July 25, 2024, 2:58pm UTC](https://forum.mautic.org/t/problem-to-setup-mail-with-mailgun/32870/2 "2024-07-25T14:58:59Z")
When mautic write the dsn in the file config/local.php, some letters are changing, @ become %40, and it doesn’t work 😉
You have to edit the file manualy !
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### Author:  [@system](https://forum.mautic.org/u/system)
#### Post date: [July 27, 2024, 2:59am UTC](https://forum.mautic.org/t/problem-to-setup-mail-with-mailgun/32870/3 "2024-07-27T02:59:36Z")
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