Outlook Classic 2024 Verbindung zu Postausgangsserver unterbrochen mit aktiven VPN Norton 360 Advance

Hallo Zusammen,

Versenden von E-Mails mit aktiven Norton 360 Advance VPN mit Outlook Classic 2024 nicht möglich,
Fehlermeldung: -Verbindung zu Postausgangsserver unterbrochen-
Empfang von E-Mails möglich.
Betriebssystem Windows 11.
E-Mailversand.+Empfang mit neuen Outlook möglich.
Ebenfalls mit Android.
Alle empfohlenen Lösungsvorschläge von Norton bereits getestet, erfolglos.
Chatmitarbeiter hatte ebenfalls keinen Erfolg.
V.G. Jürgen

Another user had the same issue. The resolution was to set up Split Tunnel for the Outlook.exe.

See this thread.

@fluegelstein Here is the announcement for the latest version. There is a nicely done workflow there that may help:

Additionally more AI suggestive info:

AI Overview

When Norton’s VPN blocks outgoing emails in Classic Outlook 2024, it usually occurs because email servers reject VPN IP addresses to prevent spam, or Norton’s active SSL/SMTP scanning interferes with the connection. To resolve this, configure Norton’s Split Tunneling to bypass the VPN for Outlook. [1, 2, 3]

Recommended Outlook 2024 SMTP Server Settings

To ensure proper server connectivity, verify your SMTP settings in Outlook: [1]

  • Outgoing Mail Server (SMTP): smtp-mail.outlook.com (for Microsoft/Outlook.com accounts) or smtp.office365.com (for Microsoft 365 business accounts)
  • Port: 587
  • Encryption Method: STARTTLS
  • Authentication: Requires authentication enabled using the same credentials as your incoming mail. [1, 2, 3]

Step 1: Add Outlook to Norton’s VPN “Split Tunneling”

By whitelisting Outlook, it will bypass the Norton VPN and connect directly to the internet, while your other apps remain protected. [1]

  1. Open your Norton 360 app.
  2. Click on Privacy in the left pane and open Secure VPN.
  3. Go to the Settings tab and locate the Split Tunneling section.
  4. Click Edit Apps or toggle the feature ON, then select Add Application.
  5. Browse your computer and select the Outlook executable file (typically outlook.exe found in your Program Files directory).
  6. Save your settings and restart Outlook. [1, 2, 3, 4, 5]

Step 2: Disable Outgoing Email Scanning (Optional)

If you still cannot send emails after whitelisting Outlook, Norton’s firewall or outgoing email scanner might be the culprit. [1]

  1. Open the Norton application and navigate to SettingsAntivirus.
  2. On the Scans and Risks tab, click Configure next to Email Antivirus Scan.
  3. Uncheck Scan outgoing email messages and click Apply.
  4. Restart your computer and try sending an email. [1, 2]

Perspectives on Norton and Outlook

While Norton is a popular choice, many experts find that third-party VPNs often conflict with Microsoft 365 or perpetual versions like Outlook 2024. [1]

Norton 360 from Microsoft Learn from Microsoft Learn

User JRSoundUR shares on Microsoft Learn that their Outlook app can’t make a server connection through Norton VPN unless it is whitelisted. [1, 2, 3]

“for months I have been able to use Outlook, with the VPN on, by whitelisting Outlook in Norton so that Outlook is allowed direct access to the internet (a “split tunnel”).”

[image]Microsoft Learn

If issues persist, consult the official Microsoft Outlook Account Settings Guide or review Norton’s VPN Split Tunneling Instructions. [1, 2]

[image][image][image]

11 sites

  • Unable to send or receive emails when connected to Norton …

Jun 26, 2026 — Norton 360 * Launch Norton 360. * At the bottom of the main screen, tap Menu and then tap VPN. * In the VPN screen, tap the Settin…

  • Email blocked due to vpn connection - Outlook - Microsoft Learn

Dec 30, 2024 — Email blocked due to vpn connection. Anonymous. Dec 30, 2024, 7:35 PM. Outlook (365 app) can’t make a server connection through No…

Microsoft Learn

  • How to Set Up and Configure Outlook SMTP to Send Emails - Mailtrap

Mar 25, 2024 — Step 3. Insert the necessary Outlook SMTP settings. To send emails through Outlook SMTP, input the following settings into your app

SA

Guten Tag,
die hier angeführten Lösungsvorschläge, wurden getestet, waren aber leider nicht Zielführend.
V.G. J.P.

When adding Outlook.exe to Split Tunnel be sure you are using the full path to the .exe. On my system it is C:\Program Files\Microsoft Office\root\Office16\outlook.exe . Do not use the generic Outlook offered in the dialog to add an app to split tunnel.

1 Like

Guten Tag,
Vielen Dank für den Hinweis.
Leider war dies auch nicht zielführend.
Mailversand ist nur mit deaktivierten VPV möglich.
V.G. Fluegelstein

@fluegelstein Do you have a FULL Office 2024 suite installed or are using the app from the Microsoft store? C:\Program Files\Microsoft Office\root\Office16/Outlook.exe was added to the VPN exclusions? Trying to clarify.

SA

@SoulAsylum
Es ist die vollständige Office 2024-Suite installiert.
C:\Program Files\Microsoft Office\root\Office16/Outlook.exe wurde zu den VPN-Ausnahmen hinzugefügt.
Das bestehende Problem trifft für 2 PC zu, 1x Desktop und 1x Laptop. Beide mit identischer Software.
V.G. Fluegelstein

1 Like