php - Sending Bulk Email Without SMTP Server -

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i have server , have emailing software. want send mass/bulk email customers list.(there around 100k people, trying gather list 10 years) , want send them email.

can send mass email without using smtp?

there couple of ways send email without need of own smtp server. there addition php can called phpmailer simplify process. or, can send php's built in mail() function, must sure to format header information correctly.

for php, question has been asked before. see link details.

however, sending mail without using verified smtp server result in email being sent customers junk mail folder. if emails destined corporate addresses, corporations firewall may drop email entirely. typically if email provider detects enough emails of kind, may blacklist ip / server time.


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