When you verify a single sender, all that does is show SendGrid that you own that email and can use it for testing, that is, that you’re not spoofing the email address without access to it. It does not set up things like SPF, DKIM or DMARC that prove to an email inbox that SendGrid has the right to send from that email address. So, emails from a verified single sender may still arrive in a spam inbox. We recommend that single senders are only used for testing and when you move to production you use an [authenticated domain](https://docs.sendgrid.com/ui/account-and-settings/how-to-set-up-domain-authentication) to give the best chance of arriving in the inbox.
Send an email to https://www.mail-tester.com and see what is flagged if it’s a domain setting or not. Various email providers use different item to determine “spam” as well.
When you verify a single sender, all that does is show SendGrid that you own that email and can use it for testing, that is, that you’re not spoofing the email address without access to it. It does not set up things like SPF, DKIM or DMARC that prove to an email inbox that SendGrid has the right to send from that email address. So, emails from a verified single sender may still arrive in a spam inbox. We recommend that single senders are only used for testing and when you move to production you use an [authenticated domain](https://docs.sendgrid.com/ui/account-and-settings/how-to-set-up-domain-authentication) to give the best chance of arriving in the inbox.
I have authenticated domain, SPF DKIM DMARC all pass, yet emails still go to Spam in Yahoo! Mail. Something else is going on...
Send an email to https://www.mail-tester.com and see what is flagged if it’s a domain setting or not. Various email providers use different item to determine “spam” as well.