Is there a way to use SendGrid's SMTP Integration API for sending bulk mail?
Here's what I have in mind: I need to send a large bulk of emails to subscribers. Since SendGrid docs recommend using SMTP Integration where possible, I would like to be able to make a single hit SendGrid and let it send the whole bulk based on email list. I know this is possible with REST API.
Is this even possible with SMTP?
Yes, this is possible with the SMTP api as well. You can check out the SMTP developers guide to see how to design this, https://sendgrid.com/docs/API_Reference/SMTP_API/integrating_with_the_smtp_api.html .
You can also check out another Sendgrid user's implementation to send bulk mail with the SMTP api here, http://community.sendgrid.com/sendgrid/topics/_net_c_cshap_api?from_gsfn=true