Likely to use our favorite mail client (Apple Mail, Outlook, …) with a POP3 mail account, at a given time, we can not send messages and mail client message reports an “error SMTP 451 – disk full”.If we solve the problem we have to follow any of the following:
- Ask the administrator of our email accounts to expand the size of your mailbox.
- Delete messages with attachments very heavy.
- Delete account and recreate it again.