I send emails containing a link to an item, which has NEVER been a problem before, and I get back a refusal from postmaster.
Send it via gmail and surprise, surprise it gets received by the recipient with all the links included, attachments added, you name it they get it.
Has bt's email service got paranoia? Is it suffering from the current trend in all works of life? You know the one where the slightest, smallest incident results in a massive knee-jerk reaction resulting in frustration and inconvenience for the vast majority?
P.S. Just clicked the link recommended to solve it..... Got a 404 error, can't find the page your looking for..... 😂
