I'm looking for a service which can do the following:
- Ensure email delivery
- Deal with bounces
- Allow large customisation of content
- Get delivered fast to tens of thousands of people
Users of my site have the option to receive a customised email, based on their preferences.
I've been using mailchimp to send the current version of this email, but it has a limit of 255 characters per merge tag, which makes slotting in very customised content difficult.
I've experimented with Amazon SES, but each email takes 3-5 seconds to send, which is too slow for tens of thousands of emails.
I've looked into postageapp, but that seems to offer only limited character variables too.
Any suggestions on how to get round this would be helpful.