I have a list of personal/professional contacts in gmail that have not opted-in to anything. These are people I have known for years. How do I move those who might be interested from a contact list in gmail to a subscriber list in ConvertKit without (a) annoying them or (b) running afoul of ConvertKit's rules (... or CAN-SPAM, for that matter)? Do I need to use a tool like GMass to send a single email blast with a link to my landing page for my newsletter? Is that legit?

💡Make the most of your Community Member profile 

Share more about yourself! Click on your gravatar> profile > edit profile 

• About You tab:
  • Photo: upload a picture of yourself or your brand
  • About You: let other community members know a little about you as a person, a creator, and anything else you'd like to add
  • Banner: add an image of your creator brand, logo, or an image that inspires your creativity
• Social Media tab:
  • Let other members know where they can find you and your brand across social media platforms. This is a great additional step to connect with other creators in the industry!