Fraudulent Emails being sent from my outlook account

[Topshrink]

Can anyone tell me how you know if someone has hacked into your outlook
account and then in turn sent out fraudulent emails from it., We use outlook
for our business, we have never had a problem until the last month, when we
had our account shut down by the server company who said we were sending out
fraudulent emails from our account. we lost all our email business for a
week whilst we tried to sort it out and even now, a lot of our emails from
outlook to other address such as hotmail or yahoo email accounts are returned
undeliverable. We dont know if our business emails are being sent or not and
what we are supposed to do at this time to stop it. We run AVG Virus
scanners on the computers

 

[Pat Willener]

This issue is too complex to give you a comprehensive response. A few tips:
- make sure that your antivirus software is up-to-date
- run regular scans on all computers (e.g. scheduled during night)
- have other anti-malware programs installed, e.g. anti-spyware apps,
keep them up-to-date, and run regular scans
- make sure Windows and other software are up-to-date with security updates
- run an online scan from http://housecall.trendmicro.com/ (use the v6.6
link at the bottom of the page)

 

[Brian Tillman [MVP - Outlook]]

This issue is too complex to give you a comprehensive response. A few
tips:
- make sure that your antivirus software is up-to-date
- run regular scans on all computers (e.g. scheduled during night)
- have other anti-malware programs installed, e.g. anti-spyware apps, keep
them up-to-date, and run regular scans
- make sure Windows and other software are up-to-date with security
updates
- run an online scan from http://housecall.trendmicro.com/ (use the v6.6
link at the bottom of the page)

And another: Change your mail account passwords often, using complex strings
so they're impossible to guess and less vulnerable to a dictionary attack.