diff --git a/public/js/components/Cis/Abgabetool/AbgabetoolAssistenz.js b/public/js/components/Cis/Abgabetool/AbgabetoolAssistenz.js
index c0c8d7ba8..a7da9da5a 100644
--- a/public/js/components/Cis/Abgabetool/AbgabetoolAssistenz.js
+++ b/public/js/components/Cis/Abgabetool/AbgabetoolAssistenz.js
@@ -7,6 +7,7 @@ import ApiAbgabe from '../../../api/factory/abgabe.js'
 import ApiStudiensemester from '../../../api/factory/studiensemester.js';
 import AbgabeterminStatusLegende from "./StatusLegende.js";
 import FhcOverlay from "../../Overlay/FhcOverlay.js";
+import { splitMailsHelper } from "../../../helpers/EmailHelpers.js"
 
 // spoofed date testing
 // const todayISO = '2025-08-08'
@@ -226,18 +227,17 @@ export const AbgabetoolAssistenz = {
 			]};
 	},
 	methods: {
-		sammelMailStudent() {
+		sammelMailStudent(param) {
+			
 			const emails = this.selectedData
 				.map(row => `${row.student_uid}@${this.domain}`)
 				.join(',');
-			
+			const uniqueRecipients = [...new Set(emails)];
 			const subject = this.$p.t('abgabetool/c4sammelmailStudentBetreff', [this.selectedStudiengangOption?.bezeichnung]);
-			
-			const href = `mailto:${emails}?subject=${subject}`;
-			
-			window.location.href = href
+			splitMailsHelper(uniqueRecipients, param.originalEvent, subject, this.$fhcAlert, this.$p)
 		},
-		sammelMailBetreuer() {
+		sammelMailBetreuer(param) {
+			
 			const recipientList = [];
 			this.selectedData.forEach(row => {
 				if (row.betreuer_mail) recipientList.push(row.betreuer_mail);
@@ -246,11 +246,8 @@ export const AbgabetoolAssistenz = {
 
 			// actually not necessary for email clients but looks better for assistenz if we avoid duplicates here
 			const uniqueRecipients = [...new Set(recipientList)];
-
 			const subject = this.$p.t('abgabetool/c4sammelmailBetreuerBetreff', [this.selectedStudiengangOption?.bezeichnung]);
-			const href = `mailto:${uniqueRecipients.join(',')}?subject=${encodeURIComponent(subject)}`;
-
-			window.location.href = href;
+			splitMailsHelper(uniqueRecipients, param.originalEvent, subject, this.$fhcAlert, this.$p)
 		},
 		selectHandler(e, cell) {
 			const row = cell.getRow();
diff --git a/public/js/components/Stv/Studentenverwaltung/Details/Kontaktieren.js b/public/js/components/Stv/Studentenverwaltung/Details/Kontaktieren.js
index bd7554a47..43995b918 100644
--- a/public/js/components/Stv/Studentenverwaltung/Details/Kontaktieren.js
+++ b/public/js/components/Stv/Studentenverwaltung/Details/Kontaktieren.js
@@ -1,3 +1,4 @@
+import { splitMailsHelper } from "../../../../helpers/EmailHelpers.js"
 export default {
 	name: "Kontaktieren",
 	computed: {
@@ -22,60 +23,16 @@ export default {
 	},
 
 	methods: {
-		async splitMails(mails, event) {
-			let splititem = ",";
-			let maillist = mails.join(splititem);
-			let mailto = "";
-
-			if (maillist.length > 2024)
-			{
-				if (await this.$fhcAlert.confirm({message: this.$p.t('stv', 'zuvieleEMails') }) === false)
-					return;
-			}
-
-			let firstrun = true;
-			let useBcc = event?.ctrlKey || event?.metaKey;
-			while (maillist.length > 0)
-			{
-				if (maillist.length > 2024)
-				{
-					let splitposition = maillist.lastIndexOf(splititem, 1900);
-					mailto = maillist.substring(0, splitposition);
-					maillist = maillist.substring(splitposition + 1);
-				}
-				else
-				{
-					mailto = maillist;
-					maillist = "";
-				}
-
-				let mailLink = useBcc ? `mailto:?bcc=${mailto}` : `mailto:${mailto}`;
-
-				if (firstrun)
-				{
-					window.location.href = mailLink;
-					firstrun = false;
-				}
-				else
-				{
-					if (await this.$fhcAlert.confirm({message: this.$p.t('stv', 'weitereEMail')}) === true)
-					{
-						window.location.href = mailLink;
-					}
-				}
-
-			}
-		},
 		internMail(event) {
 			if (this.internMails.length)
 			{
-				this.splitMails(this.internMails, event);
+				splitMailsHelper(this.privateMails, event, null, this.$fhcAlert, this.$p)
 			}
 		},
 		privateMail(event) {
 			if (this.privateMails.length)
 			{
-				this.splitMails(this.privateMails, event);
+				splitMailsHelper(this.privateMails, event, null, this.$fhcAlert, this.$p)
 			}
 		}
 	},
diff --git a/public/js/helpers/EmailHelpers.js b/public/js/helpers/EmailHelpers.js
new file mode 100644
index 000000000..87daa828a
--- /dev/null
+++ b/public/js/helpers/EmailHelpers.js
@@ -0,0 +1,45 @@
+export async function splitMailsHelper(mails, event, subject, alertPluginRef, phrasenPluginRef) {
+	let splititem = ",";
+	let maillist = mails.join(splititem);
+	let mailto = "";
+	// take subject line length + '?subject=' length into account
+	const subjectlength = subject && typeof subject === 'string' ? subject.length + 9 : 0 
+	if (maillist.length > 2024)
+	{
+		if (await alertPluginRef.confirm({message: phrasenPluginRef.t('stv', 'zuvieleEMails') }) === false)
+			return;
+	}
+
+	let firstrun = true;
+	let useBcc = event?.ctrlKey || event?.metaKey;
+	while (maillist.length > 0)
+	{
+		if (maillist.length + subjectlength > 2024)
+		{
+			let splitposition = maillist.lastIndexOf(splititem, 1900);
+			mailto = maillist.substring(0, splitposition);
+			maillist = maillist.substring(splitposition + 1);
+		}
+		else
+		{
+			mailto = maillist;
+			maillist = "";
+		}
+
+		let mailLink = useBcc ? `mailto:?bcc=${mailto}` : `mailto:${mailto}`;
+		if(subject && typeof subject === 'string') mailLink += `?subject=${subject}`
+		if (firstrun)
+		{
+			window.location.href = mailLink;
+			firstrun = false;
+		}
+		else
+		{
+			if (await alertPluginRef.confirm({message: phrasenPluginRef.t('stv', 'weitereEMail')}) === true)
+			{
+				window.location.href = mailLink;
+			}
+		}
+
+	}
+}
\ No newline at end of file