Email distribution service without address confirmation?

Question

Email Marketing

In general, the essence of the issue is this:
There is a site on which most of the forms lead to a free step, for example, there is a form that "closes" the lead to receive ready-made solutions (projects) for building houses
. In general, a situation arises that immediately after a person has submitted an application, these finished projects came to his mail
BUT , as far as I know, all services have email confirmation (after registration, you need to go to the mail and confirm the email is correct)
In general, you need a service that will not request email confirmation , but the address it will immediately get into the database and the mailing will go on
. The option "write the module in php yourself" is not suitable! We need an automated service with statistics and other things...

Answer 1

in most of these services, when adding an email via the API, confirmation is not required

Answer 2

Almost all mailing services have a subscription method through single opt-in (without double confirmation), that is, from the completed form on the site, the address will immediately enter the database. Of the advantages of a one-stage subscription: it is easier and easier to collect the database, the user immediately receives your letter with a bonus / promotion / offer in the mail.
In any of these methods, you should always add a checkbox stating that the user consents to the processing of personal data and receiving mailings in order to protect yourself from possible sanctions.