This guide details the size limits (message weight and disk space size) implemented as part of Infomaniak's messaging offers and guides you on how to check the storage used.

Mailbox size limit

⚠ Storage space in gigabytes (GB):

Email size and number limit

Regarding the messages themselves and their attachments:

• The maximum size of an email in sending and receiving is 210,763,776 bytes, or 201 MB exactly.
  • This includes header and body (text, html, attachments, etc.) regardless of the means used to send it.
  • Note that an attachment can be encoded in base64, so its size in the email is not necessarily the same as its size on disk.
• With the Infomaniak Mail web app (online service ksuite.infomaniak.com/mail) the attachment size limit is 25 MB.
  • Beyond this and up to a limit of 3 GB, a SwissTransfer link is generated and integrated into your message: the data is stored in Switzerland in Infomaniak's Cloud and your recipients can use this link to easily download the attachments during a predefined period.
  • Beyond 3 GB (and up to 50 GB), it is recommended to go directly through SwissTransfer for your sends.
• The number of messages in the respective storage space is not limited.
  • However, it is not recommended to keep more than 4,000 to 5,000 messages per folder (slows down message indexing).
  • It is therefore advisable to move your messages into subfolders, which also facilitates their consultation (you can do this manually or set up automatic sorting rules).

Email retention time limit

Retention period:

• There is no time limit for storing messages in the inbox or in subfolders, except for an email that would be deleted, marked as spam, or manually/automatically moved to the "Trash" or "Spam" folder (or any of its equivalent names such as "Deleted Items", "Deleted Messages", "Junk Mail", including spellings in other languages, "Junk" for example - non-exhaustive list)… In this case, the email is automatically deleted after 30 days without the possibility of recovery.

• Backups performed by Infomaniak have a retention period.

Display the total size from the Infomaniak Web Mail app

To do this:

1. Click here to access the Infomaniak Web Mail app (online service ksuite.infomaniak.com/mail).
2. Check or select the email address concerned in the dropdown menu of the left sidebar.
3. Click on the action menu ⋮ to the right of the item concerned in the displayed table.
4. Click on Email address settings.
5. Click on Refresh in the Storage box to display the size of the mailbox:
   

Other email limits

Refer to the other guides on this subject:

• Limits on the number of recipients per email
• Outgoing email limits per 24 hours

Still having trouble?

If the email address of your recipient is not hosted by Infomaniak, you may receive an error message when sending the email. This can take various forms, such as Recipient address rejected: 5.2.2 Over quota 554 5.0.0 Service unavailable.

This may indicate that your recipient's mailbox is full and they can no longer receive emails, or that the email you are trying to send is too large.