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How to send mail to thousand recipient at one time

Hi experts!

 My company has thousands of students, poolers.Almost of them use free mail  , so we can not send mail to all of them at one time  using micrsoft exchange .Now , I  have to write a tool to send mail  to alll of them by the following way :
 - I separate the address in to many small part  and send each part every 30 minutes .
This work but it make me hard working... do you know real free tool  do this similar task or a tip, trich to send thousand recipents at one time in .NET ?
 Thanks!
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Haipt
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Haipt
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1 Solution
 
lenamtlCommented:
Per my experience, most hosting company prevent this with quota per day and limit per hours.
You should check first the limitation with them and ajust your code to it.
Or maybe you better use your own server to achieved this.
Also for big quantity like this you can check with online mail service that can manage this probably easily with better hardware ressources.
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HaiptAuthor Commented:
Could you show me the limitation or qouta of some free mail such as : gmail , yahoo ?
eg : maximum message per day , maximum recipients at one time , max recipient per day..
Thanks you !
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HaiptAuthor Commented:
Not a complete solution but very good!
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