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# Nextcloud Mail Admin Documentation
[TOC]
## Installation
In your Nextcloud, simply navigate to »Apps«, choose the category »Social & Communication«, find the Mail app and enable it.
Then open the Mail app from the app menu. Put in your mail account credentials and off you go!
## Configuration
Certain advanced or experimental features need to be specifically enabled in your `config.php`:
### Timeouts
Depending on your mail host, it may be necessary to increase your IMAP and/or SMTP timeout threshold. Currently IMAP defaults to 20 seconds and SMTP defaults to 2 seconds. They can be changed as follows:
#### IMAP timeout
```php
'app.mail.imap.timeout' => 20
```
#### SMTP timeout
```php
'app.mail.smtp.timeout' => 2
```
### Use php-mail for sending mail
You can use the php-mail function to send mails. This is needed for some webhosters (1&1 (1und1)):
```php
'app.mail.transport' => 'php-mail'
```
## Troubleshooting
### Gmail
If you can not access your Gmail account use https://accounts.google.com/DisplayUnlockCaptcha to unlock your account.
### Outlook.com
If you can not access your Outlook.com account try to enable the 'Two-Factor Verification' (https://account.live.com/proofs/Manage) and set up an app password (https://account.live.com/proofs/AppPassword), which you then use for the Nextcloud Mail app.
### Dovecot IMAP
If your Dovecot IMAP server prefixes all folders with `INBOX`, Nextcloud Mail does not work correctly.
Check `/etc/dovecot/dovecot.conf`:
```
namespace inbox {
separator = .
# All folders prefixed
# prefix = INBOX.
prefix =
inbox = yes
type = private
}
```