Had the same prob with sendgrid bluesky smtp. Turns out my IP was blacklisted lol.
Used MXToolbox to check and had to request a new IP from support. Now it’s smooth sailing.
AWS SES is cheaper but good luck debugging when something goes wrong.
Used MXToolbox to check and had to request a new IP from support. Now it’s smooth sailing.
AWS SES is cheaper but good luck debugging when something goes wrong.