I am trying to find out if you can set the "FROM" email option in a workflow. This is for SharePoint Online.
Unfortunately today, you cannot change the From address in the Send Notification action for SharePoint Online. O365 has several restrictions on email notifications that is imposed on Nintex. But that doesn't mean it can't ever change. I would provide feedback at UserVoice 4 - Nintex Forms for Office 365: Hot (37 ideas) – Customer Feedback for Nintex and vote on the feature.
Do you know if there is an issue with this working in an on-premise installation? I have configured my Send Notification to use an email address (a distribution group) and it continues to use the default email From Address, even though it shows in the notification the correct email address I would like the notification to come from.
SharePoint seems to always have issues with distribution groups. I bet if this was a security group or individual that has the distribution's email address it would work. Try setting it as your account and see if the email changes.
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