I am currently unable to receive emails from tpg. I am using Mozilla Thunderbird and when I start the email client or click on "Get Messages" a pop-up window appears with the message, "The RETR command did not succeed. Error retrieving a message. Mail server pop3.tpg.com.au responded: [SYS/PERM] Could not read message file".
However, I can still send emails.
I have fixed this by opening a connection to pop3.tpg.com.au at port 110 using telnet then manually deleting all listed messages by the "list" command:
telnet pop3.tpg.com.au 110
Once all messages had been deleted, new emails sent to my tpg email address were received correctly by the email client.