I tried after a few minutes and got the warning again. I waited about ten, and sent an e-mail and it went through okay.
I was curious enough to call Yahoo Web Hosting from which I received my e-mail account and asked what exactly set off the red flag. Here's a few things I learned, which people with Yahoo accounts may not be aware of:
500 e-mails are allowed each day, BUT only 100 per hour
Sending a message to an official Yahoo e-group (listserv, loop) is considered only 1 message, even if there are many e-mail addresses where the message is going.
The words, FREE, or PROMO, are okay to use. (I thought maybe that's what had set off the Yahoo warning)
It's okay to put the same link in messages, as long as you don't exceed that limit.
The answer about sending the same message was kind of ambiguous, though. It may set off a red flag. The representative said it might be a possibility. The main thing is to not exceed the numbers within an hour.
Yesterday, I had set up a few categories in my contact list and sent out to those categories, which included around 28 in one and 19 in another. Then I tried to send out a joke to 4 people and it wouldn't go through and gave me the warning. so, apparently, those category e-mails plus others I'd sent must have put me over the limit.
By the way, I also asked about re-sending jokes that have lots of e-mail addresses in them. Only the addresses in your own To: line count toward your quota.
So, that's what I found out today. Apparently, this is in the fine print from Yahoo, which of course I never read!
By the way, my promo for Girl of My Dreams turned out to be my personal best, with 16,465 downloads in the US and 3024 in the UK, despite the obstacles! It's a romance, not a mystery, by the way, so I'm not mentioning more about it. (g)