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Attachments

When sending or receiving e-mail messages always take into account the following:

• The mail servers will allow up to 25 MB. It is however not recommended to send messages that large.
• Attachments in an e-mail message always have to be processed within the e-mail message itself. The encoding increases the size of the messages by one third.
  If an attachment is about 18 MB, the mail will take up about 25 MB.

Some mail server from other domains may enforce other size limits (eg. 8MB). For that reason it is recommended to keep e-mail attachements as small as possible (e.g. by compressing them to a zip file) or to make files available in an other way.

More info below the header: Exchanging files.

Save or open attachments

More info can be found here: Open or save e-mail attachments