what email marketing tools can i use with zoho crm instead of zoho campaigns?

what email marketing tools can i use with zoho crm instead of zoho campaigns?

I want to create a contextual view by using zoho crm plus as shown here 
https://www.zoho.com/crm/crmplus/resources/using-zoho-crm-plus.html

but due to couple of limitations i don't want to use zoho campaigns, is there any other email marketing program i can use which shows the email sent/open/click status right in the 360 view under zoho crm.

my requirements from email marketing software are-:
1. I should be able to change signedby and mailedby header to show my branding/domain (seems zoho campaign can let me change signedby through creating dkim but not signedby
2. Run drip campaigns
3. Remove the unsubscribe link from emails as i'll be sending them to my regular client but in bulk