Skip to main content
BusinessPrivate
LoginRegister now

Answers for private customers

The Knowledge Base for private customers is already largely up to date. A few individual articles are currently being revised and will be updated shortly. We thank you for your understanding and look forward to providing you with the latest information on using mailbox.

Please note: The Knowledge Base has changed slightly. Categories have been adjusted and any URLs stored in the old Knowledge Base are no longer valid.

Data Synchronization - Overview

Overview: Data synchronization with mailbox​

mailbox Office provides a variety of interfaces to securely and efficiently synchronize your data with different devices.
These include:

  • Mail via IMAP & SMTP
  • Calendar & Tasks via CalDAV
  • Address book via CardDAV
  • Files via the Drive Client, WebDAV, or the web interface
Data typeRecommended method
MailIMAP & SMTP
Calendar & TasksCalDAV
Address bookCardDAV
FilesDrive Client, WebDAV, or web interface

Synchronization periods and limitations​

MethodPastFutureMax. numberSpecial notes
IMAP / POP3unlimited (mails)unlimitedunlimited–
CalDAV30 years (calendar)10 years––
CardDAVno restrictions (addresses)–––
ActiveSync3 years (calendar), 18 months (mails)3 years (calendar)500 mails/folderLimited functions: no recurring tasks, max. 36 kB contact picture size

Note: ActiveSync was developed for fast synchronization on mobile devices – for large or older mailboxes we recommend IMAP and CalDAV/CardDAV.

Drive storage by plan​

PlanDrive usage
Lightonly as a team member
Standardfull access (file size up to 1 GB)
Premiumfull access (file size up to 1 GB)

System support by platform​

PlatformMailCalendarAddress bookFiles
macOSIMAP, POP3, SMTP (Apple Mail, Thunderbird)CalDAV (Calendar.app)CardDAV (Contacts.app)Drive Client & WebDAV
LinuxIMAP, POP3, SMTP (Thunderbird, KMail etc.)CalDAV (Evolution)CardDAV (Evolution)WebDAV
WindowsIMAP, POP3, SMTP (Outlook, LiveMail etc.)CalDAV (CalDAV Synchronizer)CardDAV (CalDAV Synchronizer)Drive Client for Windows
AndroidIMAP, POP3, SMTP or ActiveSyncCalDAV or ActiveSyncCardDAV or ActiveSyncDrive Client for Android (Play Store)
iOS / iPadOSIMAP, POP3, SMTP or ActiveSyncCalDAV or ActiveSyncCardDAV or ActiveSyncDrive Client for iOS (App Store)
Other smartphonesIMAP, POP3, SMTP or ActiveSyncCalDAV or ActiveSyncCardDAV or ActiveSync–
  • LinkedIn icon
  • Mastodon icon
  • Bluesky icon
  • RSS icon

Heinlein Gruppe