And the interactive nature of the mailing list allows user to help each other. This helps you develop a community among the users of your product - making your customers feel better about your product and providing you with continuous feedback so can improve your product. Since mailing lists are usually targeted to people who share a specific interest, you may be able to sell advertising to companies wishing to reach that market. Arrow allows you to define headers or footers that are added to posted messages. Tag lines are well suited to advertising since you can define multiple tag lines.
Arrow chooses a new tag line to add to each posted message.
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