Is it possible to add customers without an E-Mail address?

[Maria_Andlinger]

We have many customers who just call, but we want to track there questions and problems internally, so we have to add customers also without an e-mail address.

[Jack Brickey]

Not to my knowledge. JIRA relies on emails to identify and notify the user. If the user does not have an email then you are basically opening an issue on their behalf. I assume the scenario is that a user calls in to report an issue? If so then the agent should simply create the issue on their behalf. Create a custom field and have the agent place the necessary contact info into the field (name, number, etc).