If you using your old domain on Gsuite and have problem to send email from gsuite account, The message is like this: Your message to .name.@gmail.com has been blocked. See technical details below for more information. LEARN MORE The response was: Message rejected. See https://support.google.com/ mail/answer/69585 for more information. Probably in your domain registar dns on txt record has spam setting , the solution for this problem is Login to your domain manager, and go to DNS /txt record setting. delete the record, start with "v=spf1..." and host alias "@" after delete, add new record "v=spf1 include:_spf.google.com ~all" and host alias "@" , Time to Live (TTL)=3600 or leave as default setting, and save the setting, wait until the dns resolved +- 48 hours, or in my experince i try to send email 5 minutes later and it succes to send email. for detail instruction please check this link https://support.google.com/a/a...