My email service suddenly disappeared on Tuesday (legal problems between domain owner and email administrator, not relevant). I created a new set of emails through office 365, set up by comcast, my internet provider. They gave me a tutorial on utilizing the admin functions.
I have been trying to send a "new email" message to everybody in my address book (~2000 addresses). When setting up the accounts I was told spam limits were 500 addresses per message, 10,000 per day. My tutor also told me 900 per hour.
I may have exceeded those limits once when starting. Since then, I have been going through the alphabet letter by letter having from 50 - 150 addresses per messages. I'm watching the clock, I have been at this for two days and am through letter "p".
I have been blocked repeatedly even though I'm nowhere near the limits. Why? I unblock and wait a while, then continue.
I'm a small business owner, a chemist, without an IT department.