Problem with e-mail activation

[MedTechCD]

Some mail providers block the .icu domain.
Maybe try with an alternative e-mail address if you have one?

Confirmation e-mail is rejected as Spam by ISP

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.

Intervals.icu marked as a dangerous site

.icu domains has a tendency to be flagged as spam domains. Try using https://app.intervalsicu.co.uk/ if the problem continues.