I’ve been noticing that we’ve had an increase in bounces on comcast and yahoo emails over the past 2 months. A recent campaign bounced back over 300 comcast emails so I dug deeper. The sending IP can be tied back to other issues I’ve seen: 168.245.121.105
I used Comcast postmaster tools which drove me to Sender Score. Compared to the other IPs our domain sending has been attributed to, this one had a score of 6 and appears that something happened in April:
Send volume more than doubled for this IP. Is there a spam attack? Could Klaviyo have moved a large amount of brands to this one IP on accident or something?
Anyone else having issues as well?
