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Server Settings (IMAP, POP3, SMTP, Thunderbird, iCal, etc.)

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This is the complete listing of all settings you might need to configure your mail, calendar, contacts, connector applications:


  • Email:
    • POP3-Server (incoming server):  Port 995  (SSL-encryption ON)
    • IMAP-Server (incoming server):   Port 993  (SSL-encryption ON)
    • SMTP-Server (outgoing server): Port 25  (SSL-encryption ON)
    • Details and settings for Apple Mail (deleted messages, sent messages) can be found in the installation instructions for Apple Mail in our Support section (
  • iCAL (Apple):
    • iCAL-Server (iCal Format):<Your interWaysMAIL-Address>/
    • Public access to your calendar (if you enabled sharing):
  • Connectors for Microsoft Outlook, Apple Mac and Linux:
    • Server: (Port 443), encryption (SSL): On
    • Instructions and details for the Connectors can be found here!
  • Thunderbird/Lightning Calendar (using Lightning Plugin,
    • Install Lightning plugin (if not already installed)
    • Add new calendar
    • network calendar
    • CalDAV Account
    • Are you using an address:
      • URL of account: (Calendar for main calendar, other name for additional calendars)
    • Are you using an alternative email address in our system (does not end with
      • URL of account: (Calendar for main calendar, other name for additional calendars)
  • Thunderbird Contacts (using Zindus Plugin,
    • Install Zindus Plugin (if not already istalled), then open Extras-->Zindus
    • configure for "Zimbra Server"
    • URL of server: (Port: 443)
    • Important: go to Preferences (Thunderbird --> Extras --> Zindus) and set Global Address List (GAL) to: No
    • If we are hosting your own domain,  (directly or via MX record), then set GAL to: Yes
Maximum email size: 20MB/message
Encrypted archive files are discarded by the virus filters since they can not be scanned for viruses (due to the encryption).


  • Email:
    • POP3-Server (Posteingang):  Port 995  (SSL-Verschlüsselung EIN)
    • IMAP-Server (Posteingang):   Port 993  (SSL-Verschlüsselung EIN)
    • SMTP-Server (Postausgang): Port 25 oder 465  (SSL-Verschlüsselung EIN)
    • Details zur Einstellung von Apple Mail (Gelöschte Mails, Gesendete Mails) finden Sie in der Installationsanleitung für Apple Mail im Bereich Support.
  • iCAL (Apple):
    • iCAL-Server (iCal Format):
    • Öffentlicher Zugang zum Kalender (falls von Ihnen freigegeben):
  • Connectoren für Microsoft Outlook, Apple Mac und Linux:
    • Server: (Port 443), Verschlüsselung(SSL): Ein
    • Anleitungen und Einstellungen für die Connectoren finden Sie hier!
  • Thunderbird/Lightning Kalender (mit Lightning Plugin,
    • Neuen Kalender anlegen
    • Im Netzwerk
    • CalDAV Account
    • Nutzen Sie eine Adresse:
      • URL des Accounts: (Calendar für Hauptkalender oder anderen Kalendernamen für weitere Kalender)
    • Nutzen Sie eine andere Adresse (endet nicht mit
      • URL des Accounts: (Calendar für Hauptkalender oder anderen Kalendernamen für weitere Kalender)
  • Thunderbird Kontakte (mit Zindus Plugin,
    • Zindus Plugin installieren und über Extras-->Zindus öffnen
    • für "Zimbra Server" konfigurieren
    • URL des Servers: (evtl. Port: 443)
    • Wichtig: bei Preferences (Thunderbird --> Extras --> Zindus) stellen Sie Global Address List (GAL) auf: No
    • Wenn Sie Ihre eigene Domain bei uns hosten (direkt oder per MX Eintrag), dann stellen Sie GAL auf: Yes
Maximale Mailgrössen-Begrenzung: 20MB/Email
Verschlüsselte Archive werden vom Viren-Filter verworfen, da diese (aufgrund der Verschlüsselung) nicht auf Viren geprüft werden können.

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Recently, we introduced 2 factor authentication (TOTP: time-based one-time passwords) to our network to strengthen security for your accounts. You can use this method to generate an additional login number on your smartphone when logging into your account.

interWays is ready for the iPhone X! Welcome to our network.

NEW: We strive to be your preferred provider for innovative mail and calendaring applications. That's why we have introduced many new features recently. Click here for more info!
For up-to-date-infos regarding Windows 10 support, please read here!
interWays supports the new Outlook for iOS (Apple) and Android! Of course we will continue full support for the integrated system clients as well. Both Apps can be found in the App Stores.
interWays supports Email transport encryption for many years now. More on this...
interWays is ready for the iPhone 5S/5C and iOS 7!
NEW: We support all current Android and Blackberry phones for full Mail, Contacts and Calendar sync!
interWays has started doing all money transfers with Euro customers via SEPA.
Office and Outlook 2013: Click here!
interWays is ready for Windows 8 and Windows 8.1!
interWays is ready for Windows Phone 8!
New connectors for Outlook and Mac available in our downloads area!
interWays is ready for iOS 5 and iPhone 4S ! All features work right out of the box for iOS 5, now with Tasks sync.
interWays is ready for Mac OS 10.7 Lion. Details can be found here...

Many new features and improvements with our latest update! See here...

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NEW: Effective now, you can use shared calendars on your iPhone and Android phone! See here for setup...

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