Email address format when using a template

I am importing users from a CSV file and using a template.
However my problem is as follows:

1. When creating a template, it forces me to define an email format. It won't let me set it to blank.
2. When using the template, if I specify an email address in the csv ("mail" field), it ignores it and always uses the email format it forced me to specify in the template.

This means that to import users with specified email addresses, I either have to accept the forced template value, or decide not to use a template at all.

This is very restrictive, as our users don't all share the same email format (this is a web-based system with users being imported from various companies)

Thanks.