SBMF 6.3/ SBMG 10.0 Licence

Hello,

i'm new with Symantec products so i'll try be more clear in my question.

i have a server with symantec brightmail message filter 6.2 and last year i registred it with SBMF 6.3 and its work with me,

this year my reseller told that SBMF 6.3 licence is absolete and it remplaced with "SYMC MESSAGING GATEWAY 10.0 PER USER SUB LIC
EXPRESS BAND C BASIC 12 MONTHS"

so my question is SYMC MESSAGING GATEWAY 10.0 licence is it will work with my server SBMF 6.2