Prevent multiple calls to callback #77
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When emails are from different domains, ensure that callback is called after all of the emails are sent
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Description
Ensure that callback is called only once at the end
Motivation and Context
When emails are from different domains, ensure that callback is called after all of the emails are sent
How Has This Been Tested?
Just try send email to two different domains (Expected - callback is called when all emails are sent)
Types of changes
Bug fix (Do not return response from sending - is it really necessary ?)
Checklist: