handling SMTPA authentications Errors

[arpit456jain]

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Closes: #[issue number that will be closed through this PR]

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• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
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• [ ] My code follows the guidelines of this project.
• [ ] I have performed a self-review of my own code.
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• [ ] My changes generate no new warnings.
• [ ] Any dependent changes have been merged and published in downstream modules.