Thanks Simon and Ken! I am not aware of them having any abuse outside of our platform. I have no evidence of it.
I also should have mentioned we use shared IPs so there is no issue with volume from our servers, however volume from the domain is definitely spikey. They only send every 2-3 months when they promote a new event. I noticed that they had a lot of deferrals about an unusual rate of incoming mail when they started sending. Our ESP adapted and started throttling the customer but perhaps not enough because then the blocks started. The mail is now all getting delivered again, slowly, which in this case is fine. I'm going to talk to our ESP about throttling faster/more when they see these Gmail deferrals to keep them from turning into blocks. That sounds like it could work. Thanks all! ~Christine On Fri, Feb 24, 2023 at 11:57 AM Simon Greenwood via mailop < mailop@mailop.org> wrote: > Hello - > > Check the domain with MXToolbox if you haven't all ready - it's not > impossible that the domain or servers are on a blacklist. > > Also check that SPF and DKIM/DMARC records are good and set up for your > sending service and that reverse lookups are correct. > > Reputation in this case applies to email and not the standing of the > domain, site or another considerations like that. It could be something as > simple as Gmail not being used to seeing a large amount of mail from the > sending servers - keeping a low level of traffic passing through them seems > to improve reputation. > > Simon > On 24/02/2023 16:17, Christine Borgia via mailop wrote: > > Hello! Long time no see. I have a customer whose email campaign was > heavily blocked yesterday by Gmail with the error: > > > 421 4.7.0 [149.72.90.158 15] Our system has detected that this message is > suspicious due to the very low reputation of the sending domain. To best > protect our users from spam, the message has been blocked. Please visit > https://support.google.com/mail/answer/188131 for more information. > v14-20020a05620a440e00b0073ba7884843si8095361qkp.8 - gsmtp > > I would love to speak to someone at Gmail about this because I don't think > the customer should have a very low reputation. Of course, I could be > wrong, and Gmail is seeing something I'm not seeing. The customer has > double opt-in, low complaints, good opens, lots of purchases, and an active > social media presence with a lot of followers/fans. I think the issue is > that they only send every couple of months. They are a fashion retailer > that announces their upcoming event via email (the email we saw blocked) > and their inventory sells out during the event. > > If someone could reach out to me, I'd greatly appreciate it. I'm not sure > what to advise this customer except to say that email may not work for > their business model. > > Thx! > > -- > *Christine Borgia* > Email Deliverability Manager > [image: Shopify] > <https://www.shopify.com/?utm_medium=salessignatures&utm_source=hs_email> > > _______________________________________________ > mailop mailing listmailop@mailop.orghttps://list.mailop.org/listinfo/mailop > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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