2014-09-30 19:03:36 -05:00
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# Change mail attachment size
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2014-09-30 19:19:50 -05:00
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[TOC]
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2014-09-30 19:03:36 -05:00
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To change mail attachment size, we have to change 3 settings.
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## Change message size limit in postfix
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Postfix is MTA, so we have to change its setting to transfer mail with large
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attachment.
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2015-08-13 20:07:26 -05:00
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For example, to allow mail with 100Mb attachment, please change both
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`message_size_limit` and `mailbox_size_limit` settings like below:
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2014-09-30 19:03:36 -05:00
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```
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# postconf -e message_size_limit='104857600'
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2015-08-13 20:07:26 -05:00
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# postconf -e mailbox_size_limit='104857600'
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2014-09-30 19:03:36 -05:00
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```
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Restart postfix to make it work:
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```
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# /etc/init.d/postfix restart
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```
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__NOTES__:
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2017-03-31 04:06:55 -06:00
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* `104857600` is 100 (MB) x 1024 (KB) x 1024 (Byte).
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2014-09-30 19:03:36 -05:00
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* Mail will be encoded by mail user agent (Outlook, Thunderbird, etc) before
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transferred, the actual message size will be larger than 100MB, you can
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simplily increase above setting to 110Mb or 120Mb to make it work as expected.
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2015-08-13 20:07:26 -05:00
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* If `mailbox_size_limit` is smaller than `message_size_limit`, you will get
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error message in Postfix log file like this: `fatal: main.cf configuration
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error: mailbox_size_limit is smaller than message_size_limit`.
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2014-09-30 19:03:36 -05:00
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If you use mail clients such as Outlook, thunderbird to send mails, it's now
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ok to sent large attachment with above setting.
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2015-03-23 07:15:15 -06:00
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## Change upload file size in Roundcube webmail
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2014-09-30 19:03:36 -05:00
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2015-03-23 07:15:15 -06:00
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If you have Roundcube webmail, please change two more settings:
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2014-09-30 19:03:36 -05:00
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2014-09-30 19:19:50 -05:00
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### Change PHP setting to allow to upload large attachment
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2014-09-30 19:03:36 -05:00
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You should change `memory_limit`, `upload_max_filesize` and `post_max_size` in
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PHP config file `/etc/php.ini`
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* on RHEL/CentOS: it's `/etc/php.ini`
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* on Debian/Ubuntu, it's `/etc/php5/apache2/php.ini`
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* on FreeBSD, it's `/usr/local/etc/php.ini` for Apache, or
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`/etc/php5/fpm/php.ini` for Nginx.
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* on OpenBSD, it's `/etc/php-5.4.ini`. If you're running different PHP release,
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the version number `5.4` will be different.
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```
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memory_limit = 200M;
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upload_max_filesize = 100M;
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post_max_size = 100M;
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```
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2014-09-30 19:19:50 -05:00
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### Change Roundcube webmail settings to allow large attachment
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2014-09-30 19:03:36 -05:00
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Change same settings in file `.htaccess` under roundcube root directory:
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* on RHEL/CentOS, it's `/var/www/roundcubemail/.htaccess`
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2015-06-03 23:35:48 -05:00
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* on Debian/Ubuntu, it's `/usr/share/apache2/roundcubemail/.htaccess` or
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`/opt/www/roundcubemail/.htaccess`.
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2014-09-30 19:03:36 -05:00
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* on FreeBSD, it's `/usr/local/www/roundcubemail/.htaccess`
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* on OpenBSD, it's `/var/www/roundcubemail/.htaccess`
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2015-03-23 07:15:15 -06:00
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Note: this `.htaccess` file may not exist on some Linux/BSD distributions,
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if it doesn't exist, you can skip this step.
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2014-09-30 19:03:36 -05:00
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```
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2014-09-30 19:19:50 -05:00
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php_value memory_limit 200M
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2014-09-30 19:03:36 -05:00
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php_value upload_max_filesize 100M
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php_value post_max_size 100M
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```
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2015-08-13 19:17:35 -05:00
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Restart Apache or php-fpm service to make it work.
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2015-03-23 07:15:15 -06:00
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2015-08-13 19:17:35 -05:00
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## Change upload file size in Nginx
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2015-03-23 07:15:15 -06:00
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Find setting `client_max_body_size` in Nginx config file
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`/etc/nginx/nginx.conf`, change it to a proper value to match your need.
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```
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http {
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...
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client_max_body_size 100m;
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...
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}
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2016-05-18 21:21:55 -05:00
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```
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## Change upload file size in SOGo-3.x
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SOGo-3.x introduces parameter `WOMaxUploadSize` to limit upload file size, you
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can add it in SOGo config file `/etc/sogo/sogo.conf` with a proper attachment
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size.
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```
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2017-01-10 21:55:23 -06:00
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// set the maximum allowed size for content being sent to SOGo using a PUT or
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// a POST call. This can also limit the file attachment size being uploaded
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// to SOGo when composing a mail.
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//
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// - The value is in kilobyte.
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// - By default, the value is 0, or disabled so no limit will be set.
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WOMaxUploadSize = 102400;
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```
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Restarting SOGo service is required.
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## Change message size in SOGo-3.x
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SOGo-3.2.5 introduces parameter `SOGoMaximumMessageSizeLimit` to limit message
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size, you can add it in SOGo config file `/etc/sogo/sogo.conf` with a proper
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size:
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```
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// Parameter used to set the maximum allowed email message size when
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// composing a mail.
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// The value is in kilobytes. By default, the value is 0, or disabled so
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// no limit will be set.
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SOGoMaximumMessageSizeLimit = 102400;
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2016-05-18 21:21:55 -05:00
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```
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Restarting SOGo service is required.
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2016-09-17 21:58:35 -05:00
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## Change attachment size limit in Microsoft Outlook
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Outlook has its own attachment size limit, and will raise error like `The
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attachment size exceeds the allowable limit.`
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To modify the default attachment limit size in Outlook on Windows system,
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follow these steps:
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* Exit Outlook.
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* Start Registry Editor.
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* Locate and then select one of the following registry subkeys:
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2016-09-17 22:06:10 -05:00
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* Manually create the path in the registry if it does not currently exist.
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* `14.01 means Outlook version number, it may be different on your system.
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2016-09-17 21:58:35 -05:00
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```
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HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Preferences
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HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\14.0\Outlook\Preferences
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```
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* Add the following registry data under this subkey:
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* Value type: DWORD
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* Value name: MaximumAttachmentSize
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* Value data: An integer that specifies the total maximum allowable
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attachment size. For example, specify 30720 (Decimal) to configure a
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30-MB limit.
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2016-09-17 22:06:10 -05:00
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Notes:
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2016-09-17 21:58:35 -05:00
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* Specify a value of zero (0) if you want to configure no limit for attachments.
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* Specify a value that is less than 20 MB if you want to configure a limit
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that is less than the default 20 MB.
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* Exit Registry Editor
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* Start Outlook.
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2016-09-17 21:59:50 -05:00
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Reference: <https://support.microsoft.com/en-us/kb/2222370>
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