Need to check if email address exists or not

I want to send a bulk email to different companies but the problem is that I don't have the companies email addresses. I am thinking the default email address should be set up  sales@xxxx.xxx (same as the web address), if it fails, then the email goes to info@xxxx.xxx, then admin@xxxx.xxx, if fails, it goes directly to mypersonal email address. Can you please let me know how it can be done. This is something very-very urgent.
GurbirsAsked:
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DhaestConnect With a Mentor Commented:
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GurbirsAuthor Commented:
I need to check the whole email address but not the domain only. Also, it doesn't check for the domains like hotmail, yahoo. etc... please suggest
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DhaestCommented:
I don't like the idea that's someone is checking the emailaddress first ...
If that existed, it would take a lot less effort for spammers to send bulk mails !
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GurbirsAuthor Commented:
Even I don't like this idea, but it needs to be done that way only. Kindly help.
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GurbirsAuthor Commented:
Or if you have some other idea then I am open to ideas.
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DhaestCommented:
I'm afraid that it won't be possible. How do you check if the address exist ? Some mailservers bounce the mail back, others don't tell you anything (even if the address doesn't exist)
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