Frequently Asked Questions

Our servers have a 50 MB attachment limit for the outgoing emails sent via SMTP and webmail. However, it is recommended that your total attachment size not exceed 35 Megabytes. The reason being that there are a number of factors that can determine how large of a file attachment you may send. These factors include:

• Your email is MIME encoded, which can increase the size of the email by 40%. This means a 35 MB file is the equivalent of 35 MB of space when MIME encoded for sending as an attachment.
• Any limits your email client has on attachments.
• Any limits the recipient's server. (for example, Gmail, Yahoo! & Outlook.com all have a 25 MB limit).
• How much free space is in the recipient's e-mail account, if their mailbox has a size limit. (If their mailbox is full, your message will be rejected.)

Email Client Limitations

• Outlook 2013By default Outlook 2013 has an attachment size limit set to 20 MBs. Microsoft has created an article explaining how to override this limitation: "Attachment size exceeds the allowable limit" error when you add a large attachment to an email message in Outlook 2013