# Chrome Dangerous Site warning

**URL:** <https://discourse.mailinabox.email/t/chrome-dangerous-site-warning/16476>\
**Category:** Help with Setup/Upgrade\
**Created:** [May 20, 2026, 7:35pm UTC](https://discourse.mailinabox.email/t/chrome-dangerous-site-warning/16476 "2026-05-20T19:35:30Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![cinergi](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/c/e5b9ba/32.png) [@cinergi](https://discourse.mailinabox.email/u/cinergi)\
**Post date:** [May 20, 2026, 7:35pm UTC](https://discourse.mailinabox.email/t/chrome-dangerous-site-warning/16476/1 "2026-05-20T19:35:31Z")

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Hello all,

Occasionally, my mailinabox’s Roundcube Web interface is flagged by the Chrome browser as a Dangerous Site. This seems random - it goes away for days, then comes back. Usually closing the tab, waiting ~1 hour, and reopening it fixes the issue. My certs are all valid (as reported by Chrome itself!) and IP address and DNS are stable with no changes.

Anyone else experiencing this issue?

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**Author:** ![andrew](https://discourse.mailinabox.email/user_avatar/discourse.mailinabox.email/andrew/32/1449_2.png) [@andrew](https://discourse.mailinabox.email/u/andrew)\
**Post date:** [May 20, 2026, 11:48pm UTC](https://discourse.mailinabox.email/t/chrome-dangerous-site-warning/16476/2 "2026-05-20T23:48:14Z")

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Have you checked your IP address against the block/black lists? If you’re running on a server farm somewhere, there’s a fair chance the farm is running malicious software and your subnet might be implicated.

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**Author:** ![cinergi](https://discourse.mailinabox.email/letter_avatar_proxy/v4/letter/c/e5b9ba/32.png) [@cinergi](https://discourse.mailinabox.email/u/cinergi)\
**Post date:** [May 21, 2026, 7:38pm UTC](https://discourse.mailinabox.email/t/chrome-dangerous-site-warning/16476/3 "2026-05-21T19:38:53Z")

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Thanks. Yes, I’ve checked. My IP address is not in any blacklists.

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**Author:** ![system](https://discourse.mailinabox.email/uploads/default/original/2X/4/4d0933d13c456b7e57f296aa6cc344525b6f0c70.png) [@system](https://discourse.mailinabox.email/u/system)\
**Post date:** [May 28, 2026, 7:39pm UTC](https://discourse.mailinabox.email/t/chrome-dangerous-site-warning/16476/4 "2026-05-28T19:39:42Z")

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