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bineesh
bineesh, Computer Support Specialist
Category: Computer
Satisfied Customers: 767
Experience:  MCSE and MCP Certified Engineer
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I think I may have a sercurity problem. I have been receiving

Customer Question

I think I may have a sercurity problem. I have been receiving hundreds of mail undeliverable messages but we haven't been sending any e-mails. Then today the password XXXXX our account didn't work and had to be reset.
Submitted: 8 years ago.
Category: Computer
Expert:  bineesh replied 8 years ago.
Hi

Thanks for using Just Answer..

Please follow the steps to reslove this problem..

  1. Check your sent items box within your mail client and then open the message that you tried to send and then try resending the message.
  2. Verify you typed out the full email address in the correct location without using an address book. Double check the spelling of the recipient's email. Be sure there are no spaces or commas in the email address and that the spelling is correct.
  3. Contact the owner of the email address to verify it is valid (most problems relate to invalid addresses). Check to be sure that the email address of the recipient has not changed or he/she has not closed their email account.
  4. If you are still receiving returned email, ask the recipient to contact their ISP for assistance,
  5. The recipient's mail server may be down. Wait a while and attempt to send the message again.
  6. If sending an email with a large attachment, attempt to send another without any attachment. See Email Attachments for more information.
  7. If you see messages regarding "Too many hops" on servers outside our network, there is unfortunately nothing we can do. This is because that system is too far off the Internet backbone.
Let me know is this information helpful for you...

Customer: replied 8 years ago.
We HAVEN'T sent any e-mails.
Expert:  bineesh replied 8 years ago.
1) Some spammer is sending the original messages and using your e-mail
address as the sender.
2) Someone else has a PC infected with a virus and the virus is sending
itself as the original message and using your e-mail address as the
sender.
3) The message is the virus itself, pretending to be a returned mail.
4) Your PC is infected with a virus and it has been sending itself. And
this is really a returned mail that your PC sent.

In cases 1, 2, and 3 above, the messages are not coming from your PC and
are not going through your e-mail account. There's nothing you can do
to prevent anyone from sending an e-mail with your e-mail address as the
From header, just as you can't prevent anyone from sending a postal mail
and putting your name and address as the return address. At this point
all you can do is filter out the messages. Your ISP may offer some
filtering at the mail server.

To make sure that case 4 above is not the cause, you should check your
PC with an updated anti-virus program.

Download the malwarebytes from here and install run the full scan

http://www.2-spyware.com/review-malwarebytes-anti-malware.html