Confirmation e-mail is rejected as Spam by ISP

Bug Reports
1

Error message when trying to set up husband’s account:
bounced (host mx.lb.btinternet.com[213.120.69.2] said: 554 Message rejected on 2024/02/28 18:44:57 GMT, policy (3.2.1.1) ID (65C18F2306B854E4) - Your message looks like SPAM or has been reported as SPAM (in reply to end of DATA command))
E-mail is p*@btinternet.com.

Therefore unable to confirm e-mail address as part of account set-up.

Interestingly, my own account (r*@elitebikecoach.com) which is hosted by TSO Host, had no such problems.

2

It turns out that using an .icu domain for Intervals was unfortunate. Some ISPs block all of those. If you message me his email I can see exactly what the error is. Sometimes there is a link to report as “non spam” etc. otherwise he needs to contact his ISP and get Intervals.icu whitelisted or unblocked.