Our SMTP Mail in BC has been working without problem until exactly 13:45 (UK Time) yesterday (6th August 2024) when it started to throw this error:
The SMTP server rejected the authentication request, as the authentication data is incorrect. Verify that your Username and Password are correct and that the SMTP server supports the specified authentication type (Basic). SMTP error code: 535.
We are using SMTP Basic Authentication with an Application Password for MFA purposes, I have even created another Application Password in case the original had expired for some reason, although there is nothing to suggest that.
Any ideas as to why this would suddenly happen, I know SMTP Basic Authentication is due to be removed at some point but, BC still doesn’t seem to support OAuth 2.0 and mail is a vital function so we need a solution ?