Placed an order today and got this reply
Mail Delivery System MAILER-DAEMON@mail.ctwug.za.net
2:44 PM (7 minutes ago)
This is the mail system at host mail.ctwug.za.net.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
firstname.lastname@example.org (expanded from email@example.com): host
mail.ctwug.za.net[private/dovecot-lmtp] said: 552 5.2.2
firstname.lastname@example.org Quota exceeded (mailbox for user is full) (in reply
to end of DATA command)