There's no standard limit for emails in a welcome sequence, but mostly it might be ranging from 3 to 7, our preferred is 5 emails, 3-4 days between every 2 emails, also we suggest not to be over 2 weeks, so what we will be sending?
1st Email
Send time: right after subscription
Goal: thank the subscriber for opting-in, and introduce yourself
Don't write an article, shortly introduce yourself, thank your subscriber, give a link to the freebie if you offered any, PS them to whitelist your email or to save as a contact so they don't lose your emails or they don't end up in the spam folder, you can also tell them what they can expect from you or/and add a couple of links to articles relative to your niche
2nd Email
Send time: 2-3 days later
Goal: Provide value, a real value
this time you need to gain more trust and get more noticed by your subscriber, so you think of a pain your subscribers might be suffering from, and send them a solution like a cheat sheet, a tool, a freebie, or anything that will help them get over this pain, and remember Never push for providing sales or services at this step
3rd Email
Send time: 2-3 days later
Goal: Get them to know more about you and try to contact them
start telling about what you excel at, let them know what are your services/products or you can redirect them to your website to view everything in detail, but remember, please don't be too salesy, don't push for it. show them all you can do and let them decide, you can talk about why you are the best or why they should be dealing with you, it won't hurt if you give another value like adding links to articles.
make them more comfortable by telling them not to hesitate to contact you.