Outlook SMTP in n8n fails despite using an app password and STARTTLS. Despite correct port and host entries, authentication errors occur. Need help with configuration adjustments.
I encountered a similar issue when configuring Outlook SMTP with n8n. I had to double-check my account settings and ensure that the account security allowed for SMTP connections with modern authentication protocols. Even though the app password appeared to be valid, verifying that the account settings supported STARTTLS was crucial. I also found that sometimes using the full email address as the username rather than just the account prefix made a difference. Reviewing and adjusting these details based on Outlook’s guidelines helped resolve the authentication problems.
In my experience, getting Outlook SMTP to work with n8n took a bit more investigation into both the n8n node settings and Outlook account configuration. I discovered that even though the app password setup was correct, sometimes adjustments in the encryption method settings, such as switching from implicit TLS to an explicit STARTTLS configuration, solved the problem. It was also essential to carefully recheck the host names and ports used, as a small typo or misconfiguration can lead to persistent authentication errors. A systematic review of each parameter based on Outlook’s latest guidelines proved very effective.
hey, i fixed mine by double-checking my outlook settings and toggling starttls a few times. sometimes a simple restart and rechecking your full email as username does the trick. hope this help, cheers!
I encountered a similar challenge and found that a thorough review of both n8n and Outlook’s official documentation was essential. In my case, I revalidated every parameter, ensuring that the full email address was consistently used and that both the port and encryption method exactly matched Microsoft’s latest recommendations. Refreshing the credentials and verifying the account’s security settings were also critical steps. The key takeaway is to cross-check even the smallest detail in settings, as discrepancies in authentication parameters can lead to persistent errors.
After struggling for a while with configuring Outlook SMTP in n8n, I eventually discovered that sometimes it’s not just about repeating the usual troubleshooting steps. I learned that a deeper dive into the certificate verification process in Outlook can reveal subtle issues that lead to authentication failures. I had to inspect the SSL/TLS certificate details provided by Outlook and ensure they matched what n8n expected during the handshake. Adjusting the settings in n8n to specify the correct security protocol and enabling logging to inspect errors was crucial. Ultimately, working closely with both n8n logs and the Outlook portal helped me pinpoint a mismatch in expected certificate properties, which once corrected, resolved the issue.