What email program are you asking about. A quick Google search doesn't seem to come with a straightforward solution. Also it does depend on whether the .jpg's are attachments or embedded within the email.
My Computer
At a glance
Windows 7 Home Premium 64 bit sp1Intel i5 3570 3.4Ghz Ivy Bridge SKT 1155 quad...G-Skill Rip Jaws 16Gb (8x2) DDR3 -1600 PC3 12...Gigabyte NVIDIA GT610 1Gb DDR3 810/1200 PCI-E...
Sometimes the email program will drop all attachments into a folder set up just for that; often in the initial set up the folder can be specified, often it's defaulted for you.
My Computer
At a glance
Windows 7 Professional 64-bitDesktop i5; Acers i5 & i7desktop 16GB; 1 Acer 8GB & 1 Acer 16GB
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Antec desktop; Acer Aspire laptops
OS
Windows 7 Professional 64-bit
CPU
Desktop i5; Acers i5 & i7
Memory
desktop 16GB; 1 Acer 8GB & 1 Acer 16GB
Hard Drives
1TB split into 2 equal partitions [OS and data] usable by RJS
Internet Speed
AT&T DSL
Browser
FF, GChrome, msIE
Other Info
Windows 7 Firewall, Emsisoft AM/AV, MSE [scan-only], SpywareBlaster, Ruiware/BillP combine
Thanks for your responses, guys. Sorry for the late reply.
The email app is Windows Live Mail. As far as I can see, the only way to save this huge collection of attached pics will be to do each one individually. I think I'll train the owner to do the job - she's retired and has plenty of time.