There are only a few truly professional scripts on the market for organizing not just mass mailing, but also building an effective email marketing strategy. One of these scripts is Mumara, a script that provides absolutely all the features out of the box that anyone who understands the value of a competent mailing list will need.
Unlike analogues, in Mumara all expansion modules are already included in the kit. There are scripts that require additional modules to organize a particular function. For example, not all scripts have a module for split testing, randomization, etc. Mumara already includes everything you need in the package. In addition, Mumara comes in two versions - for your own mailings (PRO version) and for organizing a commercial service (ESP version).
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