Forum Discussion
user received alot of spam mails
one of my users received alot of spam mails overnight. is this a O365 issue
we just realized that this user is not only receiving spams.
his email is sending out spam mails since yesterday afternoon.
one every 3-4 mins.
beside changing password what else can we do ?
his email is sending out spam mails since yesterday afternoon.
one every 3-4 mins.
beside changing password what else can we do ?
Follow the steps mentioned in the article:
https://blogs.technet.microsoft.com/office365security/how-to-fix-a-compromised-hacked-microsoft-office-365-account/
And make sure you check if someone else has permission on this mailbox and i would suggest you check for mailbox audit log( if it is turned on) for anu unusual sign ins.
You may also get the azure sign in logs from the azure AD portal.
Turn on Multi factor authentication for this account immediately.
https://blogs.technet.microsoft.com/office365security/how-to-fix-a-compromised-hacked-microsoft-office-365-account/
And make sure you check if someone else has permission on this mailbox and i would suggest you check for mailbox audit log( if it is turned on) for anu unusual sign ins.
You may also get the azure sign in logs from the azure AD portal.
Turn on Multi factor authentication for this account immediately.
- Yes! Do the steps above! Then take preventative action next like considering MFA for all accounts , make sure if not already, to set up SPF, DKIM and DMARC to prevent spam, spoofing, phishing etc..
https://docs.microsoft.com/en-us/office365/securitycompliance/use-dmarc-to-validate-email
https://docs.microsoft.com/en-us/office365/securitycompliance/use-dkim-to-validate-outbound-email
https://docs.microsoft.com/en-us/office365/securitycompliance/set-up-spf-in-office-365-to-help-prevent-spoofing
Adam- have changed the user email password.
the spams have stopped.
have checked there is no mailbox delegation.
