Please add to the Email Marketer few things that will make it better:
Add the same Client Criteria options we have in the Mass Mail tool to the Email Marketer. So we can select specific Client Groups and some other custom fields we added to the customer profile.
I know that there are several modules to integrate WHMCS with emailing systems / auto responders - but this is not a good fit for me.
As far as I know the modules works only at the customer level without the contacts - so I can't use it if I want to send emails to contacts.
Also In general I want to use WHMCS as much as I can without adding any unnecessary modules - and since there is the Mass Mail tool and also the email marketer - I would like to try to use them if it's possible.