Four Ways to Develop Backlinks and Increase Your Search Rankings
Webmasters with popular blogs will delete outreach emails requesting a backlink because they get more requests than they can handle.
Email Templates
Email template requests almost never work because the person will have gotten emails with the same template so many times that can read the first line and recognize the template. The only people who may not have seen a template are people with blogs that have too small of an audience to matter.
Unique Content
Suggesting a unique article of yours that would interest a popular blogger's audience may pique their interest. Unique means that you took a survey, did an amazing amount of research or interviewed a top expert in your field to create your article. You have to include a teaser to encourage the recipient to click on the link; everyone thinks their work is amazing and just stating what your article is about isn't enough.
Give-Aways
Give away a free e-book, WordPress template or anything else. Email your target and tell them about the free item and mention that it is something that the persons readers would find useful.
Infographics
Create an infographic that includes your research instead of writing an article. People like to publish, share and retweet infographics. You can always outsource the design if you're not artistically inclined.
Interviews
Find someone in your niche to interview. Make it someone who has enough readers to make the backlink worthwhile, but not someone who is super popular. Suggest a telephone interview; keep the interview under 10 minutes and you'll get a better response. Suggest a specific topic, such as their take on voice searches. Send them the link once you post the interview. The person will tweet it and publish the link on their website; an interview is proof that a person is an expert.
Email Subject Line
Finally, if a person is an authority in your niche, you have to have a great email subject line or your email will never be read. For more information click here https://www.reddit.com/r/SEO/comments/8ekzxr/whatsmallthingshaveyoudonetooptimizeemail/.