Case sensitive email address, that's a bit sloppy. I hope it is fixed as it will catch lots of folk out leading to frustration.
The name part of email address is case sensitive although the domain name should not be.
I.e.
FredBloggs@domain.com is different to fredbloggs@domain.com
But
fredbloggs@domain.com is same as fredbloggs@DOMAIN.COM
If Geoff's email name started incorrectly with a cap then it was legitimately rejected.
However, I agree that mixed case cause confusion as some mail servers use strict case handling whilst others are more lax, including disregarding other characters such as '.' In the email address. But its all down to how the email server is configured and IMHO, it's not up to Meridian to assume that an email address can be treated less strictly than the standards specify.