MailJerry3.4.1 - App Store

Easy Email Migration with MailJerry

Need to migrate emails and don't know how? With MailJerry, you don't have to be an IT expert. Our email migration tool takes care of all your emails and migrates them securely to their new destination.

With the MailJerry email migration tool, you can copy your emails to a new server or mailbox and sync your emails after the migration. MailJerry works with all major providers, exchange accounts & all IMAP mailboxes!
FEATURES:

+ Mailbox Sync
After the migration, MailJerry keeps your accounts synchronised.

+ Migrate Emails & Folders
MailJerry migrates your complete folder structure including drafts & sent objects.

+ Works with All Providers
Gmail, MS 365, iCloud, Yahoo!, GMX, Exchange and all IMAP accounts

+ Bulk Migration
Easily migrate hundreds of mailboxes. With CSV upload!

+ No Duplicates
MailJerry checks if your account already contains data & prevents duplicates.

+ Mailbox Health Check
Our email migration service ensures that your new mailbox is ready to receive your data.

+ 100% Secure
Your emails are strictly private. MailJerry does not read or store any of your data.
COMPATIBILITY:

MailJerry works with all major providers, mail clients & all IMAP accounts

With the MailJerry app, you can easily migrate your emails to a new provider.
You don’t know the address of your mail server or your email port? Be it Gmail, Yahoo, outlook.com, Amazon Simple Email, GMX, Exchange or many more, MailJerry comes with a large range of provider presets and facilitates your migration.
Lean back and enjoy the smoothest email migration ever:
MailJerry - The most efficient way to migrate email accounts!

Version History - Bugfix for advanced settings 3.4.1 09/02/2025 NEW: GMAIL OAUTH2 INTEGRATION
Simply connect with your Gmail account using OAuth2: Just enter your Gmail address and log in using your regular Gmail login method.
NEW: BANDWIDTH THROTTLING for UPLOADS / DOWNLOADS
Control your migration's daily bandwidth usage with ease. Set a daily limit to stay within your provider’s restrictions — especially convenient for Gmail and Microsoft 365 migrations.
NEW: ENHANCED MS365 ERROR HANDLING
Did you get disconnected by your MS 365 server during the email migration? With our improved error handling, you get detailed insights into why Microsoft 365 cut the connection — and what steps you can take to prevent disconnects in the future.
NEW: TAC SECURITY VERIFICATION
We've successfully passed the CASA Risk and Vulnerability Assessment by TAC Security and are now ESOF-verified. That means even stronger protection for your migrations. 3.4.0 08/28/2025 IMPROVEMENTS:

- optimized advanced settings
- improved MS 365 and Gmail migration workflow 3.3.1 07/16/2025 + LOG FILE DOWNLOAD

Download a log file of your migration to trace exactly what happened — down to the last folder and message.
+ EASILY MANAGE DUPLICATES

You can now decide if you want to migrate duplicate messages that already exist in the target mailbox. This adds more flexibility to your migration workflow, especially when dealing with Gmail labels. And in case you change your opinion, you can easily remove duplicates anytime.
+ MIGRATION CACHE

The migration cache speeds up the migration of very large mailboxes and facilitates email migrations from or to providers that limit bandwidth (e.g. Gmail, MS365…).
+ REDUCE BANDWIDTH CONSUMPTION

A new setting that reduces bandwidth usage during your migration or mailbox sync. Ideal for large mailboxes or when dealing with bandwidth restrictions (e.g., Gmail or MS365).
+ IMPROVEMENTS:

- Added source and target server information to the migration overview.
- Improved status updates for auto sync and backup mode.
- Bulk migration overview: fixed issues when switching pages during active migrations. 3.3.0 07/03/2025 NEW: MIGRATE EXISTING DUPLICATES
This option allows to also migrate duplicates (e.g. copied emails) that already exist in the source mailbox.

NEW: IMPROVED ERROR MESSAGES
Extended error messages with useful tips that help if the connection to one of the email accounts cannot be established. 3.2.0 12/03/2024 NEW FEATURE: FILTER EMAILS

With the latest MailJerry release, you can filter your email data by date:

- only migrate emails starting from a specific date
- only migrate emails received until a specific date
- migrate emails between a custom date range

This feature is extremely handy if you have a large mailbox and do not wish to migrate all your email data or if you want to split your large mailbox into several accounts. 3.1.0 07/31/2024 IMPROVEMENTS:

- fixed a few minor bugs for bulk migration with certain account types 3.0.1 07/08/2024 BULK MIGRATION:

Migrate multiple emails in one go – it’s never been easier to perform a mass email migration!

- Migrated unlimited mailboxes from one mail server to another
- Manage backup interval and sync options for all mailboxes at once
- Easily upload the access data via CSV file
MIGRATION DETAILS:

Keep track of your current migration:

- See which folder is currently being migrated
- View the number of emails & data volume per second
- Check the speed of your mail servers
- See how many emails were migrated, skipped or failed
FOLDER DETAILS:

Detailed overview of:

- Migrated folders / labels
- Migrated, skipped, and failed emails

Easily track how many emails were migrated into which folder!
IMPROVED MAILBOX CHECK:

MailJerry now shows which folders are currently being processed during the mailbox check.
ADVANCED DUPLICATE-PREVENTION:

Change the email header settings to prevent duplicates when migrating between mail servers that use different email headers. This is especially convenient for Microsoft 365 migrations!
AUTO-DELETE FOR FINISHED MIGRATIONS:

Automatically delete finished migrations after the selected time span to keep your migration overview clean and concise! 3.0.0 07/02/2024 IMPROVEMENTS:
- facilitate oAuth Login for Microsoft GoDaddy 365 accounts
- fixed some issues with MS 365 authentication when no username was provided 2.2.3 12/04/2023 NEW FEATURES:

- Backup Mode:
Permanently backup your emails into another mailbox. Sync your account daily, weekly or monthly without time limitations. With the backup mode, all your emails are automatically copied to your backup email account!

- Ignore Bandwidth Limits:
Ignore the bandwidth limits of certain providers and enjoy an even faster & smoother email migration. 2.2.2 10/26/2023 NEW FEATURES:

- Connect with Microsoft / Office 365 via oAuth2
- Easily connect with Gmail & Yahoo!
- New server presets available for Microsoft / Office 365, Yahoo, Gmail… 2.1.0 10/06/2023 NEW FEATURE:
- Connect to your Gmail account via app password 2.0.1 05/26/2022 New Migration Report:

Detailed summary of your migration containing all relevant parameters.

- Number of migrated emails
- Number of skipped emails that were already contained in the target mailbox
- Number of emails that were rejected by the mailserver
- Error log for rejected emails that allows you or your provider to replicate and resolve the problem
Advanced Mailbox Synchronization:

Faster and smoother mailbox synchronization to keep mailboxes synced after the migration with detailed report.

- Mailboxes can be synced any time using the „Sync now“ feature
- Summary of all synchronizations
- Start and end date of the last sync
- Number of synced emails
- Number of rejected emails with error log
Advanced error detection:

In case problems with one or both mail servers occur during the migration or a sync, the app now reports the cause of the problem and provides advice on how to resolve the issue.

- Evaluation of the error messages sent by the source or target server
- Added solutions to resolve server errors
- Failed migrations can be re-started through the Re-Sync feature
Improvements:

- Estimated remaining time is available during the migration
- Added optional Port-Settings to connect with a mailserver
- Switch between various SSL-Encryption methods if necessary
- Migrations can be started, even if the target server provides wrong quotas
- Improved performance: Faster connection to and data collection from the involved mailboxes 2.0.0 04/28/2022 New Features:
- Refresh button to update the mailbox data in the transfer summary
- Advanced mailserver validation

Improvements:
- Added hints when entering the mailserver
- Improved display of transfers in the transfer list on the iPad
- General optimizations & bugfixes 1.0.6 05/27/2021 - Performance optimization & bugfixes 1.0.5 04/23/2021 - Run multiple transfers simultaneously
- View the details of your running transfer
- Optimization for Gmail Accounts
- Better error messages & instructions for Gmail users 1.0.4 04/21/2021 New Feature: IMAP sync for all mailboxes 1.0.3 04/06/2021 1.0 04/01/2021