wiggy4ever said:
i did what you said, but it isnt helping, I am using GMail btw...any other ideas?
Sadly this doesn't work with GMail...there are known issues with how it handles POP mail. That is, it doesn't just do this to Macs...it also does this to, for instance, my Windows Mobile handheld.
But back to the question of how to transfer 100 e-mails from one Mac to another. This is something I think you can do.
On the laptop: Either highlight each of the 100 messages, or else move them to a folder or a smart folder, and then highlight all the messages in there. Then, File -> Save As. Make sure the format is "Raw Message Source." Select a location and save the file. This will create a .mbox file.
Transfer this file using whatever means (burn CD, network, bluetooth, etc) from your laptop to your desktop.
Then, on the desktop, File -> Import Mailboxes. Click the last option (Other). You will be asked to show Mail.app where the .mbox file is. Navigate to it. NOTE: You choose the folder containing it, NOT THE FILE. The file will be greyed out, but this is normal. Do not be alarmed. You will get a window asking you which mailboxes to import; there will only be one. Select it and continue. You will then get a new Saved Messages (Offline) Mailbox on your desktop Mail.app with the same name. Inside it will be a folder with your 100 messages. From there, you can drag and drop them wherever you want, and then delete the Saved Messages Mailbox that was created in the process.
Please let me know if this helps?

Good luck!