If you want to write a blog, then you must know how to use your writing skills and how will you promote your blog. Blog promotion is done by those people who are business owners. Many blog owners are involved in affiliate programs. Bloggers make money by posting advertisements on their sites. Thus, you earn money from your own blog and also from those clicks which are received by those advertisements.
If you want to get benefits from this method, then you need to know through which technique you will get visitors for your blog. You can do this by searching the mail group that can promote your blog. This is the mail list of those readers who have same interests in the niche in which you are writing your blog, and they can be potential customers in future.
The main point is that how will you find such mail group. You need to keep your own interests, so that all people who are in your mail list share same interests with you. Communication is very important for promotion of a blog between blogger and people.
You need to find mail groups that are relevant to your blog or blogs. It is not compulsory that the mail groups have exactly the same interest; the subject of your blog can be relevant to their interest.
At last, you need to promote your blog gradually. You do not need to take many mailing lists, as you would not be able to manage so many mail lists. Choose only such mail lists that are supposed to offer great benefits to you.