Solution :
Please note that if there are excessive junk mails generated from any particular mail id, then the mail server will automatically stop that particular email account.
We request you to recheck the following details and update us.
1. If you have configured your mails in outlook,then kindly recheck whether the local system has been infected.If so kindly take the backup and format your system and put original OS,antivirus.
2. If you are having any from mails,kindly recheck whether you have implemented captcha code which will prevant automatic submission of forms.
3. If your mails are not configured in outlook and if you are using the mails in webmail means then kindly change all your mail password with tougher one. Make sure that you are having alphanumeric characters.
We request you to check and take neccessary action at your end.