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I am configuring the latest version of CiviCRM (Drupal) to use Mailgun as an external SMTP service. When I go to Administer > System Settings > Outbound Email, enter the SMTP credentials, and click Save & Send Test Email, everything works great, I receive the test email, and the masked password continues to appear in the password field. If I then go to send a mailing, my emails all bounce with the error:

authentication failure [SMTP: Invalid response code received from SMTP server while sending email. This is often caused by a misconfiguration in Outbound Email settings. Please verify the settings at Administer CiviCRM >> Global Settings >> Outbound Ema

When I return to the Outbound Email page, the masked password is now gone, and I'm unable to send another test without reentering the password. If I reenter the password and click Save instead of Save & Send Test Email the same thing happens. When I return to the Outbound Email page, the saved password is gone.

I didn't set up this CiviCRM installation, I'm just helping someone out with theirs. Is there a setting I'm missing that would account for this? Is it possible an overriding SMTP password is passed in as an environment variable somewhere or something?

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  • Check in sites/default/civicrm.settings.php. Somebody may have set an override for smtp.
    – Demerit
    Sep 9, 2022 at 2:28
  • Also if it's a recent-ish version of civi check if civicrm.settings.php has CIVICRM_CRED_KEYS and CIVICRM_SIGN_KEYS defined. If not you can use this tool to generate: civisettings.symbiotic.coop
    – Demerit
    Sep 9, 2022 at 2:32
  • @Demerit There are cred and sign keys but nothing related to SMTP.
    – selfagency
    Sep 9, 2022 at 15:43

1 Answer 1

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I was incorrect, the password is not being deleted. It just requires a certain flag to be passed to load in the existing password, which is saved in the database.

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