Attachments, in e-mail, are frequently encoded in a manner which causes them to take up between 50 and 80% more space than the size of the actual attachment.
Are you running into an issue with storage, or memory, on the SmarterMail server into which you are importing?
Bruce Barnes
ChicagoNetTech Inc
brucecnt@comcast.net
Phonr: (773) 491-9019
Phone: (224) 444-0169
E-Mail and DNS Security Specialist
Network Security Specialist
Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/
Web and E-Mail Hosting, E-Mail Security and Consulting