diff --git a/buzz/proposals/doctype/event_proposal/event_proposal.js b/buzz/proposals/doctype/event_proposal/event_proposal.js
index 2ecbd086..be3e07a4 100644
--- a/buzz/proposals/doctype/event_proposal/event_proposal.js
+++ b/buzz/proposals/doctype/event_proposal/event_proposal.js
@@ -2,6 +2,12 @@
 // For license information, please see license.txt
 
 frappe.ui.form.on("Event Proposal", {
+	// Guest submissions leave owner as "Guest", so there is nothing to prefill.
+	get_email_recipients(frm, fieldname) {
+		const owner = frm.doc.owner || "";
+		return fieldname === "recipients" && owner.includes("@") ? [owner] : [];
+	},
+
 	refresh(frm) {
 		if (!frm.is_new() && frm.doc.docstatus == 0) {
 			frm.set_intro("Buzz Event will be created on submission of this document", "yellow");
diff --git a/buzz/proposals/doctype/sponsorship_enquiry/sponsorship_enquiry.js b/buzz/proposals/doctype/sponsorship_enquiry/sponsorship_enquiry.js
index c1b225b6..46cdf228 100644
--- a/buzz/proposals/doctype/sponsorship_enquiry/sponsorship_enquiry.js
+++ b/buzz/proposals/doctype/sponsorship_enquiry/sponsorship_enquiry.js
@@ -2,6 +2,11 @@
 // For license information, please see license.txt
 
 frappe.ui.form.on("Sponsorship Enquiry", {
+	get_email_recipients(frm, fieldname) {
+		const owner = frm.doc.owner || "";
+		return fieldname === "recipients" && owner.includes("@") ? [owner] : [];
+	},
+
 	setup(frm) {
 		frm.set_query("tier", (doc) => {
 			return {
diff --git a/buzz/proposals/doctype/talk_proposal/talk_proposal.js b/buzz/proposals/doctype/talk_proposal/talk_proposal.js
index 9f3af9d3..b8f38b8b 100644
--- a/buzz/proposals/doctype/talk_proposal/talk_proposal.js
+++ b/buzz/proposals/doctype/talk_proposal/talk_proposal.js
@@ -2,6 +2,13 @@
 // For license information, please see license.txt
 
 frappe.ui.form.on("Talk Proposal", {
+	get_email_recipients(frm, fieldname) {
+		if (fieldname !== "recipients") {
+			return [];
+		}
+		return (frm.doc.speakers || []).map((speaker) => speaker.email).filter(Boolean);
+	},
+
 	refresh(frm) {
 		if (frm.doc.status != "Accepted") {
 			const btn = frm.add_custom_button(__("Accept and Create Talk"), () => {