>>It depends on the ISP and the email client. I got these off the net somewhere (don't remember where) for four of them. Actually, I don't know if these even still hold true. They're a couple of years old.
>>
>>AOL: 52 characters
>>Hotmail: 45 characters
>>Outlook Express: 64 characters
>>Yahoo: 80 characters
>
>I received one with 106 characters in Outlook.

Could be. The above list has Outlook Express, not Outlook. And as I said, the list may be outdated by now too. bottom line is that there is no 'standard' for subject line maximum.