What is the best mail migration utility for Mac or on the web?

I've used GMail's auto-migration and Mac Mail's "select all and drag and drop to other mailbox" options before but are there any other free alternatives that work better with less bugs and failures?
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Mark GalvinManaging Director / Principal ConsultantCommented:

What are you migrating to and from?
turbojournalAuthor Commented:
Hotmail, GMail, Outlook, iCloud, Exchange, .Me, Live, SBCGlobal, and a few others all to GMail.
Christopher BarnesCommented:
For migrating to Google Apps Business Accounts from Outlook, Exchange or imap:

Bulk Exchange Mailboxes and imap - https://tools.google.com/dlpage/exchangemigration

Client-less Bulk Exchange Mailboxes and imap - https://support.google.com/a/answer/6003169  (limits to 6-12 months of historically messages!)

Outlook Client or a few PST files - https://tools.google.com/dlpage/outlookmigration

Migrating from all other local mail stores or to free Gmail Personal accounts:

1. Use EmailChemy or other to get your messages into a MBOX standard format.

2. Use Thunderbird and their IMPORT/EXPORT Add-In

3. Use IMAP with Thunderbird to transfer messages/folders. Thunderbird works well with Gmail and can handle waits and re-trys.

Emailchemy http://www.weirdkid.com/products/emailchemy/#purchase converts email from the closed, proprietary file formats of the most popular (and many of yesterday's forgotten) email applications to standard, portable formats that any application can use.  These standard formats are ideal for importing, long term archival, database entry, or forensic analysis and eDiscovery.

Thunderbird: Works well with Gmail IMAP to upload and transfer messages.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Email Clients

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.