Some would ask why it's even necessary to have a marketing email list. After all, those that they are competing against you don't have mailing list one either. Well, for starters, you should be asking yourself whether or not the business you are referring to has had any type of success. That would be a viable reason to look into them.
If you are wanting to pattern your business after them and ultimately experience what they are going through, have at it. To be totally mailing list honest, there are some pros and cons of owning a marketing email list. The advantages, which are too numerous to mention is that for one, you have a list. This list is something that is constantly being updated on a regular basis.
It will enable you to pretty much at the push of a button or send a simple offline mailing to your clients on a whim. Measure that up against mailing list someone who haven't taken the time to establish this asset. Secondly your communication and relationship building is ongoing so you will always be able to have good rapport with your marketing email list.