Misdirected emails to spam folders

[Billx]

Sent an email from: x@tiscali.co.uk to:     x@talktalk.net; x@tiscali.co.uk
After 10 minutes,
Nothing received by the inbox folders of x@talktalk.net; x@tiscali.co.uk

Then I went via TalkTalk webmail
Then I checked the spam folders at          x@talktalk.net; x@tiscali.co.uk
                                                                             and found the missing emails there, in both
Then I moved each of them from the spam folder to the related inbox folder.
Then I went back to the email client
Then very soon after, I received each of the emails at the related inbox folder, of the email client.

I then repeated the above, in the other direction:
Sent an email from: x@talktalk.net to: x@tiscali.co.uk; x@talktalk.net
The same long procedure and the same results.

What the hell is going on?
Are the OX people completely incompetent?

Or is it just their AI?

Bill

[Billx]

I've carried out 8 tests and show the results below.
Can the OX people or their AI do the same tests, and see where they have gone wrong?

I often use 'new OUTLOOK', but also TalkTalk webmail.
Using 'new OUTLOOK' cannot always solve the problem.
For some emails, if TalkTalk has put them in the SPAM folder, 'new OUTLOOK' cannot see them or ignores them, and just leaves them there.

Bill

---
Results of 4 combinations when BOTH x@talktalk.net and x@tiscali.co.uk are whitelisted in 'Allowlist' in TalkTalk webmail. The 4 depend on which of the 2 email addresses comes first in 'From:', and which of the 2 is doing the sending to the other.
---
From: x@talktalk.net
Subject: Test 20
To: x@talktalk.net, x@tiscali.co.uk

-
Result Failure: Received in x@tiscali.co.uk inbox folder, Received in x@talktalk.net SPAM folder

---
From: x@talktalk.net
Subject: Test 21
To x@tiscali.co.uk, x@talktalk.net

-
Result Success: Received in x@tiscali.co.uk inbox folder, Received in x@talktalk.net inbox folder

---
From: x@tiscali.co.uk
Subject: Test 22
To: x@tiscali.co.uk, x@talktalk.net

-
Result Success: Received in x@tiscali.co.uk inbox folder, Received in x@talktalk.net inbox folder

---
From: x@tiscali.co.uk
Subject: Test 23
To: x@talktalk.net, x@tiscali.co.uk

-
Result Success: Received in x@tiscali.co.uk inbox folder, Received in x@talktalk.net inbox folder

---
Results of 4 combinations when NEITHER x@talktalk.net nor x@tiscali.co.uk are whitelisted in 'Allowlist' in TalkTalk webmail. The 4 depend on which of the 2 email addresses comes first in 'From:', and which of the 2 is doing the sending to the other.
---
From: x@talktalk.net
Subject: Test 31
To: x@talktalk.net; x@tiscali.co.uk
-
Result Success: Received in x@tiscali.co.uk inbox folder; Received in x@talktalk.net inbox folder

---
From: x@talktalk.net
Subject: Test 32
To x@tiscali.co.uk; x@talktalk.net
-
Result Success: Received in x@tiscali.co.uk inbox folder; Received in x@talktalk.net inbox folder

---
From: x@tiscali.co.uk
Subject: Test 33
To: x@tiscali.co.uk; x@talktalk.net
-
Result Failure: Received in x@tiscali.co.uk SPAM folder; Received in x@talktalk.net SPAM folder

---
From: x@tiscali.co.uk
Subject: Test 34
To: x@talktalk.net; x@tiscali.co.uk
-
Result Success: Received in x@tiscali.co.uk inbox folder; Received in x@talktalk.net inbox folder

---

Oh,
a simple email from x@tiscali.co.uk to x@talktalk.net without being whitelisted will go the SPAM folder.
a simple email from x@talktalk.net to x@tiscali.co.uk without being whitelisted will go the SPAM folder.
a simple email from x@talktalk.net to x@talktalk.net (you can't whitelist this) will go the SPAM folder.
(This because a TalkTalk email address can't whitelist itself.)
Only
a simple email from x@tiscali.co.uk to x@tiscali.co.uk without being whitelisted will go the inbox folder.
So, even if one cross-whitelists both,
you cannot do a successful test email from x@talktalk.net to x@talktalk.net