I did not receive e-mails from a sender at cytanet.com.cy to my ntlworld.com address. I only found this out when somebody who was on cc replied to me. I asked the sender at cytanet.com.cy to send me a test e-mail to my alternative email at virginmedia.com and receive them ok. the same applies whether I'm checking email on PC or android phone.
I had similar issues a couple of years ago with a cytanet.com.cy sender and that's why I set up the virginmedia.com e-mail and it was resolved when I logged the issue but I don't remember how and can't find it.
I can send you more details ie actual messages and full addresses if you need it.
