Renaming files

[Odhiambo Washington]

I have several files in this format:

rw-r--r--   1 johndoe johndoe    20085 Jan  9 19:30 1357744249.26989.mbox:2,
-rw-r--r--   1 johndoe johndoe    24419 Jan  9 19:30
1357744250.26989.mbox:2,
-rw-r--r--   1 johndoe johndoe      418 Jan  9 19:30
1357744251.26989.mbox:2,
-rw-r--r--   1 johndoe johndoe      418 Jan  9 19:30
1357744252.26989.mbox:2,
-rw-r--r--   1 johndoe johndoe    78426 Jan  9 19:30
1357744254.26989.mbox:2,
-rw-r--r--   1 johndoe johndoe     2561 Jan  9 19:30
1357744255.26989.mbox:2,
-rw-r--r--   1 johndoe johndoe     6971 Jan  9 19:30
1357744257.26989.mbox:2,
-rw-r--r--   1 johndoe johndoe    11270 Jan  9 19:30
1357744259.26989.mbox:2,

I'd like to rename them so that the filenames are in the format below:

-rw-------   1 johndoe johndoe  197702 Jan 10 03:00
1357776052.V803I33939aM83469.mail.domain.me.net:2,
-rw-------   1 johndoe johndoe   14579 Jan 10 03:31
1357777873.V803I33939bM614733.mail.domain.me.net:2,
-rw-------   1 johndoe johndoe   29212 Jan 10 03:46
1357778798.V803I33939cM995892.mail.domain.me.net:2,
-rw-------   1 johndoe johndoe    2834 Jan 10 04:30
1357781421.V803I33939dM597872.mail.domain.me.net:2,
-rw-------   1 johndoe johndoe   10593 Jan 10 06:18
1357787890.V803I33939eM865700.mail.domain.me.net:2,
-rw-------   1 johndoe johndoe   43565 Jan 10 07:10
1357791044.V803I33939fM193189.mail.domain.me.net:2,
-rw-------   1 johndoe johndoe   15492 Jan 10 07:42
1357792926.V803I3393a0M601349.mail.domain.me.net:2,


The first part of the filename is unique, so I just need to substitute
26989.mbox:2, with V803I33939aM83469.mail.domain.me.net:2, hoping there
will be no clash:(

-- 
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
I can't hear you -- I'm using the scrambler.