Sent Email for User Registration Going to Spam


Can you detail the reasons that would cause emails to be sent to spam? In an old topic the one reason I read was if the ‘From Email’ and ‘User ID’ were different. Are there any more?

This reason is applicable to me because I am using an MS Office subscription with an email as the ‘User ID’ but am using an email alias for the ‘From Email’. Not sure yet how to fix that, but would this be the only reason emails are going to spam?


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Backendless Version (3.x / 5.x, Online / Managed / Pro )

Client SDK (REST / Android / Objective-C / Swift / JS )

Application ID

Expected Behavior

Please describe the expected behavior of the issue, starting from the first action.

Actual Behavior

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Be descriptive: “it doesn’t work” does not describe what the behavior actually is – instead, say “the request returns a 400 error with message XXX”. Copy and paste your logs, and include any URLs.

Reproducible Test Case

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If the issue is more complex or requires configuration, please provide a link to a project on Github that reproduces the issue.

There may be multiple reasons, but ultimately it is the mail client’s decision how to classify a message. Here’s a blog post from Google on this topic.