Precautions for Thunderbird+IMAP

SC2 2017-07-18

2021-09-08

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Precautions for Thunderbird+IMAP

to japanese

Mozilla Thunderbird is an open source e-mail software being developed.

It uses the same rendering engine Gecko as Mozilla Firefox, and has platforms for Windows, Mac, and Linux.

In addition to sending and receiving e-mail, it has an RSS reader, junk mail filter, calendar function, and has a tab display interface.

With the rise of Webmail, the demand for email clients is relatively low, making Thunderbird a valuable free-use email client.

Well, the main subject.

Be careful when adding an IMAP account such as Gmail to Thunderbird.

[Example: Thunderbird + IMAP (Gmail)]

IMAP setup for Gmail account on Thunderbird
Restart Thunderbird
Thunderbird freezes (actually working)
Recover after leaving for a few minutes

It appears to freeze, but Thunderbird scans a large amount of mail stored on the mail server and caches it on a local drive.

It's very inconvenient because I can't accept other operations until the scan is over, so I'll share the Thunderbird IMAP settings I recommend.

IMAP recommended settings

This is an example of setting up a Gmail account for Thunderbird.

[point]

OFF: Sync all messages locally
OFF: Check for new messages at startup
OFF: Check for new messages every xx minutes

1. Do not check for new messages at startup

Immediately after setting up your IMAP account in Thunderbird, " Sync all messages locally " is enabled.

Change server and sync settings before restarting.

[Flow of IMAP setup]

Add IMAP account
Change server settings ← Important
Change sync and disk space settings ← Important
restart

Adding a Gmail-IMAP account to Thunderbird and restarting immediately is dangerous.

Since the synchronization process will be executed after restarting, it will be in a frozen state until all the emails stored in the Gmail server and the local drive of the PC are synchronized.

Please be careful of users who have never deleted the received mail of Gmail.

Although,

Gmail's free user is Max 15GB, so it may be a problem for those who use the latest PC.

Server settings

Account settings> Server settings

Check for new messages at startup
Check for new messages every xx minutes

2. Account Settings> Sync & Disk Space

Change the sync and disk space settings as follows:


After change	Save last xx days of messages locally
Change before	"Sync all messages locally"

Summary

[Thunderbird＋IMAP]

Do not restart immediately after adding an IMAP account
Uncheck new mail confirmation (server setting)
Do not store all messages locally (disk space)

The advantage of IMAP is that you can manage your emails on multiple devices including PCs, smartphones and tablets.

Your Android device comes pre-installed with the Gmail app, but you can set up your provider email in the Gmail app.

Please search the related articles for specific steps.

Verification: Thunderbird 52.2.1

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