I am unable to send emails to groups of contacts.  I keep receiving this error code:

File: outlook\pstprx\storeas\utils\airsyncstatuscodes.h
Line: 104
HTTP/1.1 200 OK
MailStatus: 115
To re-try press F9...
Error Code: 0x80004005

It says that my mail boxes are full.
Please help. This is extremely frustrating and is costing my business.
These are mail recipients who have requested that I send them emails (my customers) and I am unable to contact them.
Thanks.
Jackie
I am unable to send emails to groups of contacts.  I keep receiving this error code:

File: outlook\pstprx\storeas\utils\airsyncstatuscodes.h
Line: 104
HTTP/1.1 200 OK
MailStatus: 115
To re-try press F9...
Error Code: 0x80004005

It says that my mail boxes are full.
Please help. This is extremely frustrating and is costing my business.
These are mail recipients who have requested that I send them emails (my customers) and I am unable to contact them.
Thanks.
Jackie