Our users started to get errors recently when sending email to google business and google free users. The errors have to do with our email signature having a .jpeg/jpg/png/gif or something that I cannot understand. We use a third party spam filter for inbound and outbound mail.
Is there anything I can do on the GroupWiuse side or client side to get this to work? We are on 18.0 and this happens with the web and full clients.
The original message was received at Tue, 24 May 2022 16:49:11 +0100
----- The following addresses had permanent fatal errors -----
(reason: 552-5.7.0 This message was blocked because its content presents a potential)
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... while talking to gmail-smtp-in.l.google.com.:
<<< 552-5.7.0 This message was blocked because its content presents a potential
<<< 552-5.7.0 security issue. Please visit
<<< 552-5.7.0 support.google.com/.../ to review our
<<< 552 5.7.0 message content and attachment content guidelines. a10-20020a1cf00a000000b003974c04eb8bsi2244547wmb.181 - gsmtp
554 5.0.0 Service unavailable