Hello. I am about to move my email system to exchange online, level 1. I do surveys for a living and I usually launch a survey by sending out a bunch of emails invitations (evites). I simply use the mail merge function in Word with excel holding the merged data (email addresses). Depending on the situation, I might want to send as much as 1,000 to 2,000 emails pretty much at the same time (or as quickly as the software and isp allow) but more typically it's 100-200 at a time. My annual quantity is probably something like 10,000. Allow is the word--over time I have sometimes found that someone might limit me--good old verizon, for example, would hold only allow 20 emails at a time, not accepting more for a couple minutes. I also know other times email screening services might black list me, until it could be sorted out.
So my question is: are there any quantity restrictions or special procedures that I might encounter in exchange online given my description above?
Thank you very much.