Mail.app Cloud Oddity

[TaliesinSoft]

I Have my email in the cloud, manageable from my iMac, iPad, and
iPhone. What I find odd is that when I send email from Mail.app the
receiver sometimes receives the email not froom talies...@me.com or
talies...@mac.com (thank you Apple for changing mac.com to me.com
which still causes confusion) but from taliesinsoft@icloud. When this
happens the recipient cannot respond without changing the address back
to such as talies...@me.com. This seems like an odditiy which can be
avoided, but I have no idea how that can be done. Suggestions and/or
solutions will be most appreciated.
--
James Leo Ryan - Austin, Texas