Set a script to trigger an alarm if/when gmail gets blacklisted.) then do a whitelist or decrease impact of blacklist for gmail below that line. This same area should have bypass options - but DO NOT whitelist gmail at the top of the stack, instead run all other security checks that should be firing at an individual mail item (NOT domain) (anti malware, phish, links, encrypted. Usually somewhere in the mail-flow settings there are hierarchical lists that allow you to prioritise what scanning/security engines fire first and priority on what the engines do. Determine if there is an option to place google mail in a do not block from reputation alone status.I do NOT have Barracuda experience so high level advice. I have not seen ANY of these vendors block any of the large web-mail services, but they DO block individual gmail/outlook/yahoo/Facebook senders. Proofpoint/Mimecast/Microsoft Exchange ATP - use reputation feeds, but also use a lot of other logic engines to determine spaminess of email.
Any web-mail service will have this issue as they offer free email accounts with no means of vetting legitimate users (there are ways but they are not employing them). Barracuda is ingesting spam-list, spam list calls out google for spamming, legitimate gmail users in a town trying to send email to the city cannot as since all of gmail is getting tagged as spam, ad you are trying to fix the issue.Īnecdotal information - during a 15 day period gmail accounted for ~ 7,000 of 60,000 emails quarantined for SPAM score (over 10%).