TDC had an Email server error on 27 March(Japan time). You may experienced problem that you cannot send email to TDC.
The wrong setting was fixed right after we found the error and currently email connection came back to normal.
I am deeply sorry for inconvenience we may have caused.
Please contact the staff in charge again.
If you found further problem in email connection, please try the last word of our email address changing from “.com” to “.net” or call us up +81-22-356-3131.
TDC’s facebook page’s DM (direct message) are always open. https://www.facebook.com/TDC.Corporation/