Dear Mailop,

Since the beginning of this month we have seen Gmail bringing up a 'Suspicious 
Link' warning when clicking a link. The behaviour is very inconsistent; 
warnings can appear and then not appear when testing with the same IP, sender 
subdomain, content, etc and only a few minutes difference.

Others have also recently reported this issue, e.g. see: Others have also 
reported this recently; see https://support.google.com/mail/thread/4242603?hl=en

I was wondering if anyone here in Mailop has seen these warnings and how they 
managed to solve it.

Example with a tracked link:
[cid:[email protected]]

Example with an untracked link (to google.be):
[cid:[email protected]]


Things we tested on our side:


  *   Check the subdomain reputation in Google Postmaster: ok
  *   Check the IP reputation in Google Postmaster: ok
  *   Check the Spam Complaint rate for the subdomain in Google Postmaster: ok
  *   Check that the IP is not on any blacklists: ok
  *   Check that the subdomain does not make too many redirects: ok
  *   Run a Spamassasin check on the content: ok
  *   Run a Google Safe Browsing check on the subdomain (using 
https://transparencyreport.google.com/safe-browsing/search): ok
  *   Check that all authentication is resolving (SPF, DKIM & DMARC): ok
  *   Check that that TLS 1.2 is enabled and used with Gmail: ok
  *   Check that the subdomain has a valid SSL record: ok

Since we can't see any issues in these checks, we reached out to Google via 
their Bulk Sender Contact Form; but without much luck so far.

Any hints as to what could be causing this would be much appreciated.

Kind regards,

Jon


- - - - -
Jon Burke
Deliverability Consultant

email  [email protected]<mailto:[email protected]>
mobile  +44 7990 069 027

SELLIGENT MARKETING CLOUD
CONSUMER-FIRST MARKETING
www.selligent.com<http://www.selligent.com/>

[cid:[email protected]]

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