I have currently Rackspace Cloud Server on static range to send mail.
Amazon SES as part of AWS seems to be designed for "bulk and transitional" emailing.
Is there any solution for "regular email"?
AWS IP range is dynamic, hence, it's impossible to send mail from these. Also, it seems that SES is not the correct way of doing it either, or maybe, it is?
You have really two ways of solving this:
Launch email-server ec2 instance, allocate and assign Elastic IP to it and remove EC2 email limitations by contacting Amazon https://portal.aws.amazon.com/gp/aws/html-forms-controller/contactus/ec2-email-limit-rdns-request
Buy separate dedicated server/VPS and make VPN tunnel to it from your servers.
I personally prefer the second way and think that AWS is not really suited for emailing even with SES.
You should read this: http://support.rightscale.com/09-Clouds/AWS/01-AWS_Basics/How_do_I_send_reliable_email_from_EC2%3F
To send reliable mail you have to setup SMTP server on one of your AWS instances with Elastic IP, request limitations to be disabled and create Reverse DNS record, and other DNS records (SPF, DKIM).
I would not recommend amazon SES for transactional/regular email. Here by transactional I mean 'signup emails for websites', 'receipt emails for e-commerce sites' etc. SES is shared among many users, so abuse by another user might delay/block your legitimate email. Browse the SES forum to see the occurences of such events. If you know how to setup and maintain an email server, stick to your rackspace static IP.