Question

Mendix Email Module: Error 550 5.2.1 with Outlook SMTP

0

Hello everyone, I'm encountering an issue while trying to send an email through my Mendix application. The error message I receive is: Error 550 5.2.1 Mailbox cannot be accessed [FR2P281CA0023.DEUP281.PROD.OUTLOOK.COM] 2025-07-10T06:48:54.076Z 08DDBF16B46EC4E1 Has anyone experienced this before or knows what might be causing it? I'm using Outlook as the SMTP server. Any guidance on how to resolve this would be greatly appreciated. Thanks in advance for your help!

asked 2025-07-10

Jeril Davis Palatty

2 answers

RAJU PATEL · Answer 1 · 2025-07-10

Check below question

Mendix Community - Question Details

Joost Verhoog · Answer 2 · 2025-07-10

This is an error from the SMTP server. You could search online for ways to resolve this. The first search result gave https://www.siteground.com/kb/smtp-error-550/ for me, which describes the 550 5.2.1 error:

>The recipient or their mail provider may need to adjust mailbox settings to accept emails, or your domain may be blocked by the recipient’s email server. In some cases, the recipient’s mailbox settings may be configured to reject emails from unknown senders or those not on a pre-approved list.