I am facing a problem with mail delivery. My project is based on PHP application. I am using smtp to send mails . A group mail is sent from a email tool. If by any chance any one of the email address format withing the recipient group is incorrect (ex dora@yahoo) , then the email fails to get delivered.
What actually is blocking the email? Is it due to some PHP inbuilt mail function? Or does the smtp blocks it?
Please help me guys to solve this issue.
my problem got solved. Actually the problem was due to one invalid email address present in the group of recipients.