Thanks Chris. The sender is working from home for a small business. The email address is
[email protected]. All other people using this domain get through to me fine, and name@ also gets through to other people fine. If it were a blacklisted IP address would this still be the case?
I guess the sender is using a personal laptop, rather than a business one, and knowing the person well, they are unlikely to access emails from their phone or be willing or able to log in from a public wifi to test this.
Since its only me experiencing this, there is little sympathy or interest in solving it!
Can you help me double double check my settings?