If you are looking to refine your overall marketing strategy, perhaps it is time to create an Email Marketing Campaign. Here's how you can begin creating and launching your very first Campaign:

Objective
Begin by determining the objective of your email marketing campaign- What purpose will the sent email convey? Most campaigns contain emails that either educate their user base, announce events, or promote products and services. Decide on a call to action you want the email readers to perform and what counts as measurable success metrics for your campaign. It is also imperative to know your email contact lists and which lists of people you want the email to be sent to.
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Service Providers
When it comes to creating an email marketing campaign, you will often be required to send bulk emails and track them. Email platforms are ill equipped for that, so it is highly recommended that you consider choosing and using email marketing service providers like Mail Chimp. Mail Chimp allows you to create and manage email databases, as well as furnishes you with campaign management services and free to use customizable email templates, thereby simplifying your process even further. Make sure to import the email addresses of your existing and potential customers and set up email lists within Mail Chimp.

Campaign Creation & Tracking
Using Mail Chimp, create and name your email marketing campaign with something concise that you can identify with no risk of confusing it with other subsequent email marketing campaigns. One good recommendation would be to name your campaign with the purpose, followed by the date. After which, set up tracking measures. You will subsequently be able to view them through the Reports Overview page.

Email Creation
After the campaign is created and named, you will then be required to create the email that is to be sent to existing or potential customers. Email marketing platforms like Mail Chimp usually assists by providing customizable templates that users can make modifications to. Include the logo, address and contact details of your corporation with links to social sites and your business website.

Come up with strong subject lines to further compel readers into opening your emails, include attractive headlines, and advantage/feature driven content. The content of your email should be engaging but short, with a heavy focus on either features or benefits that are advantageous to email readers. In addition, the email should also contain a good text to image ratio, balancing out the whole visual aspect.

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Schedule
Upon completion, your campaign is now ready to send and test out. Schedule your emails and test out the performance of your emails based on the open and click rates. Experiment with different timings and days to see if the effectiveness increases. This will allow you to essentially find out the optimal timing for your emails to be received- the same timing can be used for other email marketing campaigns subsequently. Determine a specific length of time for your email marketing campaign before you take a look at the performance results.

Assess
Mail Chimp allows users to track both open rates as well as click rates. Take a look at how often your emails are opened, identify which links are clicked on the most and analyses other relevant data that can be of use to your next marketing strategy. This enables you to make changes for re-targeting and further improve results.

credit: http://www.akwaonline.com/2017/07/how-to-create-your-first-email.html

I feel like you need to do some research and make sure that the company you are hiring has enough positive feedback or it will be bad

Yeah a good company is very important if you want to do a successful marking campaign especially online. I recently had to look for a company that did just that because I started a new online business and we needed to find a company that would create the perfect email template for our newsletter for all the clients that subscribed. I was looking online and it turns out there are a lot of companies that do that but I did like one in particular. They had some really nice options and they provided the best bulk email marketing service when it came to the price/quality equation. I have been really pleased with the results and I have had not that many people unsubscribe, so I feel like they did their job well.