outgoing e-mail appears blocked

[BGhome]

Tiscali e-mail and outlook. window11: outgoing emails to gmail.com  addresses not being received. account settings appear OK. Any ideas please?

[Gondola]

If the email has gone into the TalkTalk Sent folder then it's been sent.

Gmail's newish policy on spam control means that a lot of mail sent to Gmail addresses is being dumped by Gmail into Spam folders without checking if it's genuine or not.