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A profile can be mapped to more than one project, using the Project Mappings as previously described. If there is more than one project mapped then you can use rules to direct the emails to the correct project. If there is only one project mapped, then you will not be able to add a new rule, because the default settings will always apply.
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Syntax help for using regexes are described on this page. A more in depth guide on how to create Project Mapping Rules can be found here: Use Project Mappings | Scenario 2: Adding a Rule Driven Project Mapping.
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The current rule options are:
From regexesregexps
This is a list of regexes regexps used to match the email sender address.
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This checks if the sender is a Jira User that belongs within one of the selected group.
Recipient regexesregexps
A list of regexes regexps that is used to match a specific email recipients address.
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