Hello, Your point is very important because in the outbound process we have to warm up email for better deliverability.
When I started Outbound, I followed some simple processes and I would like to share that all with you and the domain community.
#1: Conversation with your Friends or Family.
You can ask your friends or family members to communicate with you by email.
Note: Try to avoid selling or domaining talked with them because you are just communicating for a warm-up email. Just talk about normal things.
#2 Find Product or Services Companies and communicate with them.
I know, It sounds weird but trusts me it works very fine in my journey, and hope it will help you as well.
Example: You can find a Website Development agency and ask for their services, Price, and how they work but lastly don't forget to mention you are not interested so they will stop following up.
These simple steps will defiantly complete your warm-up process.
Thank you
Vinay Khatri
DomainHelps.com