This guide details the limits of your mailbox in terms of size (message weight and disk space) implemented as part of Infomaniak's mail offers and guides you to check the used storage.

Mailbox size limit

✔ Storage space in GB:

The number of messages in the respective storage space is not limited. However, it is not recommended to keep more than 4000 to 5000 messages per folder (slowing 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.

Limit of the size of each e-mail

• The maximum size of an e-mail 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 size limit of attachments 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 the Infomaniak Cloud and your recipients will be able to 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 shipments.

Message retention time limit

• There is no time limit for message retention in the inbox or in subfolders, except for an email that would be deleted, or marked as spam, or manually/automatically moved to the "Trash" or "Spam" folder (or one of its equivalent names such as "Deleted Items", "Deleted Messages", "Junk Mail", including spelled in another language, "Junk" for example - non-exhaustive list)… In this case, the email is automatically deleted after 30 days without 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 settings:
   
5. Click on Refresh in the Storage box to display the mailbox size:
   

Other email limits

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

Still having issues?

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.