"A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
(generated from XXXX@XXX.uk.com)
Disk quota exceeded:
mailbox is full: retry timeout exceeded"
Please note XXX's are my own to preserve their confidentiality!
Nobody else is having any trouble getting emails through to this client however - everyone else in the firm can email her without any problem. This is a HUGE problem for me - she is my biggest client. Any suggestions as to what the problem might be?