So its now May and I still haven't seen a solution to this yet!
I have had similar but different issues and mine started mid December as well. I am in tears because I am on my 3rd senior advisor and they eventually fall off the face of the earth and stop contacting/responding to me! I have been in contact with them since the beginning of January😢😢😢
I have 3 iCloud accounts (his/hers/work) His and hers are both working perfectly fine... sending/receiving!!! The work one however is the problem.
I originally was not able to send or receive, but now I can only receive... However, my problem lies with me not being able to send to my clients!
I purchased the iPhone 7 when it first came out and did not have this problem until December, so I knew it was not the new phone. But since, I have gotten a new MacBook pro and Desktop (both in January) thinking that may solve the problem but it did not.
I have created new email addresses (att, gmail and iCloud) and ALL of them will only receive not send! For my clients, I never put anything in location, so that's where my problem differs a little from most of the posts I am seeing here. I have also done this from iCal app (on phone, mac, macbook pro) and done it from iCloud.com (on all three as well) Still no difference.
It still doesn't make any sense that 2 of my email/iCloud accounts are working fine but only one is not.
If anyone has found a solution, has advice or remembers how to get ahold of the person they spoke with that was able to help, I would greatly appreciate it! I'm so frustrated that I cannot get anyone to follow up with me!!!