Mathstat Webmail

AddressBookImport

SquirrelMail addressbooks could be exported as csv and then needs to be converted to vcard format for import into RoundCube.

There are many free convertors available on the internet to convert from csv to vcard and back.

CSV to Vcard - http://homepage.mac.com/phrogz/CSV2vCard_v2.html

Vcard to CSV - http://labs.brotherli.ch/vcfconvert/