Hello. I am Tom Uffner, the owner of a Consulting firm in Newark, Delaware. I am a native English speaker, and I have good communication skills.
When you hire me, your project becomes my project. Aside from one employee who does clerical work and answers the phone, I do all of the work myself. My company will never subcontract a project unless the client explicitly requests it.
My specialty is network protocols, network applications, and security. I have been working with most of the Internet protocols since they were invented. I am familiar with a wide range of network applications, both open-source and proprietary.
I am an expert on DNS, blacklists, spam filters, and other things that make email go wrong. I probably spend more time fighting spam and working around overzealous spam filters to allow legitimate email to be delivered than any other sysadmin task.
I can check your DNS, and suggest/make improvements if any are possible. I can scan your application and the emails that it sends for the common triggers that get you flagged as spam. I can check blacklists and get mistaken or unfair listings removed.
I can help transfer your email to Rackspace and revise your mailing script to make it work again.
There are many possibilities. I would need to understand your setup and see samples of rejected email in order to determine the best approach(es).
This bid is for the project you described. Even if delayed, I will finish it at this price unless you change the scope.