I received a "Suspicious sign in prevented" email this morning for one of my Gmail accounts. I changed my password just in case but upon inspecting the email details it looks odd.

It was accessed by which seems to be owned by Google (mail-ie0-f131.google.com). When opening up account activity I get 'Unknown' under access type. So it hasn't even logged whether it was accessed by a browser or by POP.

This all seems very strange. Should I be worried?

  • 2
    Do you have any Google Scripts which access your Gmail?
    – ale
    Commented Jul 26, 2014 at 13:14
  • No. I do have another gmail account scraping it's pop3 tho.
    – toster-cx
    Commented Aug 13, 2014 at 17:14
  • How do you know that IP address belongs to Google?
    – Luke
    Commented Jul 31, 2018 at 0:19
  • @LuketheGeek reverse DNS
    – toster-cx
    Commented Jul 31, 2018 at 5:05

1 Answer 1


Any suspicious alert should be reviewed carefully. Other users could try to access to your account from other Gmail accounts. If you didn't enabled two step verification (2SV) yet, do it now.

From About 2-Step Verification - Google Accounts Help

Why you should use 2-Step Verification
2-Step Verification adds an extra layer of security to your Google Account, drastically reducing the chances of having the personal information in your account stolen. To break into an account with 2-Step Verification, bad guys would not only have to know your username and password, they'd also have to get a hold of your phone.

The above article includes a step by step guide to enable 2SV.

Last account activity - Gmail Help
Detecting suspicious account activity - Official Gmail Blog

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