I need bulk email sending way for spam .

You can make a smtp server then you send.
 
how to make a smtp server without blacklisting?
 
find a VPS with RDNS Record and open port 25
buy from there a VPS server they provide you a static IP
check if the IP is blacklisted
if not you are ok with setting up your mail server
if yes before you do anything ask VPS support for a good clean IP

tip so after that you need a good warmup of your mail server, if not you will be blacklisted
 
Use PHPMailer and then for SMTP server use that of amazon aws
 
Setup the PMTA on VPS server
 
You have two options for sending emails: using Gmail with an app password or utilizing the Gmail API. Using the Gmail API to send emails is highly beneficial—it’s cost-effective and allows you to send up to 400-800 emails at once from a single SMTP. Additionally, Gmail’s pricing is inexpensive, typically ranging from 0.10 to 0.12 per email. Therefore, it’s the best way to send bulk emails.”
 
You have two options for sending emails: using Gmail with an app password or utilizing the Gmail API. Using the Gmail API to send emails is highly beneficial—it’s cost-effective and allows you to send up to 400-800 emails at once from a single SMTP. Additionally, Gmail’s pricing is inexpensive, typically ranging from 0.10 to 0.12 per email. Therefore, it’s the best way to send bulk emails.”
Unless you typo'd, $0.10 - $0.12 per email is not even remotely close to "inexpensive". Lol.
 
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