Warm up Gsuite account help

Hello,
After read lot threads on BHW about cold email, i have started to try sending some emails with 10 accounts.
i was sending for each Gsuite 10 emails by hour using a script by smtp
now i m getting errors and when i check the gsuite i can see few problems :


i guess its due to non valid emails? is there any way to test an email if its fake or not?

Thanks in advance
and sorry for my bad english

A little bump?

i bet there is a script/software to check if an email is valid or not.

digitalcode said:

i bet there is a script/software to check if an email is valid or not.

Click to expand...

Thank you, i found out some working well.
By the way, some Gmail accounts are showing mails sent in "sent" folder, but i m not receiving them. Is it this way google ban? the account is useless for now? or will it be abble to send email again?
Thanks for help