I've created a workflow that takes an email from a single line text field and uses it as a parameter in the "TO" field of sending email.
But I had to change the field to multiline plain text, and now the email is no longer being sent.
When I see the field on Sharepoint list edit mode, Sharepoint put the e-mail into html a tag like:
<a href="mailto:[email protected]">[email protected]</a>
When I switch back to single line text it works again, but I need to register multiple emails in the same field and single line text does not suit me.