What Email programs do you use to contact the end users ? (Auto-edit templates)

[Domainer1111]

hi guys,

I read some posts and some of you use email utility to auto-edit the message templates and send personal emails to end users. It's taking a lot of time to do it manually. Please share which programs do you use and which are the most flexible ones.

thanks.

 

[lexisdomains]

I use VerticalResponse.com.