No confirmation email on form submission

Hello all, 

I have created a form that is set up to send an email to a fixed email address and also to send a confirmation email to whoever submitted the form. The user's email address is an input field in the form itself. 

We are using SendGrid. I confirmed that the recipient receives the form submission email successfully. However, the submitter never gets a confirmation email even if it is set up within epi. 

Any ideas as to how I can get the submitter to receive a confirmation email as well? Anyone has the same issue? 

Note that I have tried ports 587 and 465 with same results. 

<configuration>

<system.net>

<mailSettings>

<smtpfrom="do-not-reply@org.placeholder.com">

<networkhost="smtp.sendgrid.net"password="[API key generated in management portal]"userName="[generated in management portal]"port="587" />

</smtp>

</mailSettings>

</system.net>

</configuration>