I'm facing a frustrating issue where my verification emails are going through just fine on Gmail, but I'm hitting major roadblocks with Yahoo and Hotmail. Even though I've set up SPF and DKIM correctly, and have DMARC in place, I'm still receiving '550 high-probability spam' responses and random complaint reports from Yahoo. It's only happening with these two email providers. I'm wondering if the stricter filters on their end in 2025 are the cause, or if there's something else I might be missing that could resolve this problem?
2 Answers
Have you checked your IP reputation? That can often cause issues, especially if the IP gets flagged.
Make sure your DMARC policy is set to avoid softfails. Both SPF and DKIM need to be correctly configured—any slight deviation in the DMARC policy allowing for softfails could mark your entire domain as spam. You can use MXToolbox to diagnose any issues; their DMARC lookup tool is especially helpful for this.
Definitely use the MXToolbox mail deliverability tool! It’ll give you a rundown of potential problems. Sometimes, it’s a blacklist issue or misconfiguration like too many SPF lookups.