Sending some links through email fail to go through to recipient

I noticed that sending certain links through email do not get received by the recipient. I tried to narrow down the issue, and it seems to be on the Apple side. This does not happen with every link I try to send, but I have provided one particular link below that this happens with as an example. **Description:** I create an email and place the following link in the body of the email: https://groundedtechs.com The email shows as "sent", shows up in my sent folder, and no error messages are created. However, the recipient never receives the email, in neither Inbox or Junk/Spam folders. This issue only happens when sending some links through email, not every link. The issue persists if sending through iCloud Mail, iPhone Mail app, and Mac OS Mail app. I tried the following combinations of sender/receiver account addresses, with the following results: | Sender | Receiver | Result | |:---: |:------:| :----:| | Apple Email | Apple Email | **Fail to receive** | |Apple Email | Google Email | **Fail to receive**| |Google Email| Apple Email | Successfully received| |Google Email | Google Email | Successfully received| I'm not sure why this is. Is Apple scanning sent emails for possible spam? If so, how come I never get any notification that my email was not sent through, or was rejected? Thanks!