Emails via smtp.talktalk.net are not arriving at yahoo recipients and the same has been happening with gmail. No arrival in spam and no response message with an error code. This makes using tiscali or talktalk addresses more or less impossible.
Perhaps as there have been so many incoming phishing emails (restore account, new invoice, to name a recent couple) it only takes a few people to fall for them for the reputation of all to suffer.
Ideally TalkTalk would have filtered out the phishing emails, but now other providers must be ignoring even valid SPF and DMARC.
