Some institutions would like the ability to send account emails in bulk when importing new patrons (e.g. A school adding new patrons at the start of each term)
This feature seems to have already been added to Koha. At the bottom of the Import patrons tool page there is an option to "Send email to new patrons" and notes that the "WELCOME notice is used".
*** This bug has been marked as a duplicate of bug 29005 ***