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How to send mail to thousand recipient at one time

Posted on 2010-11-15
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Last Modified: 2013-11-13
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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Question by:Haipt
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lenamtl earned 1500 total points
ID: 34142055
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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Author Comment

by:Haipt
ID: 34213597
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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Author Closing Comment

by:Haipt
ID: 34276363
Not a complete solution but very good!
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