The last few sends have seen a significant increase in blocked bounces, which makes me think we're dealing with a sender reputation issue. We're using a SAP with a shared IP and only sending to about 1,000 recipients per month. Are there any common reputation-related issues I should be looking into beyond authentication and content testing? I've tested the emails in Email on Acid and they're returning low spam scores, so I'm struggling to identify the root cause.
I'm also considering switching to a sending domain used by another BU that has significantly higher volume. However, I'm concerned that if the underlying reputation issue isn't addressed, the problem will just follow us. Has anyone tried this approach, and did it actually help?
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