SMS, MMS, and Ringless voicemail CRM software

I NEED STRONG AND FAST SOFTWARE DEVELOPEMENT

Functionality overview:

Mass SMS/MMS  sending and contact managing with twillo, sprint,tmobile or at&t developer api intergration. Need to send 200k-1 million contacts a day.

-Email Sending- 200k- 1 Million emails daily or with Twillio or with a custom internal smtp server

-Ringless voicemail - choose contacts and send mass voice messages that go directly to the reciepents voicemail. I need to send 100k-200k vociemails

Additonal features- custom smtp servers, Cloud base software, custom numbers to choose from to send, custom opt-in names,

Perfect examples of what im looking ( combine these three) : for the sms funciality => [login to view URL] ..... email ==> [login to view URL] .....ringless voicemail==>[login to view URL]

Questions to answer when you message:

-Can you deliver all the send goals ?

-Can you make an independt smtp server that i can send 1 million plus contact daily using gsm modem if needed. ?

- How long will it take to deliver the complete software ?

- How many months of support do I get?

- What are all the extra expenses i need to cover other than the software development service?

Asterisk PBX 软件构架 安卓 移动应用开发 软件开发 VoIP

项目ID： #23481147

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