N-Able Mail Assure

N-able Mail Assure is a cloud-based email security suite that protects inbound and outbound email using collective threat intelligence, providing a layer of email continuity along with long-term off-pre email archiving. It works with any email service including Zimbra, Microsoft 365 and POP3 / IMAP mailboxes.

Mail Assure is an advanced and highly configurable solution designed to provide organisation with:

  • Extra Protection – Adds an extra layer of protection against spam, viruses, malware, phishing, ransomware and other threats on inbound and outbound email
  • Extra Visibility – Get control over email – release, remove, block, or approve messages with preventive measures to minimise accidental blocking or releasing.

If your primary email service goes down, Mail Assure will queue emails for up to 14 days, with incoming mail held in a delivery queue for viewing. This queuing mechanism acts as a critical safety net that prevents email loss during server outages, maintenance windows, or technical failures.

Users can access and review the delivery queue directly, allowing them to see pending emails and address urgent matters even whilst the primary server remains offline. This visibility ensures that critical communications aren’t overlooked during downtime periods.

Instead of bouncing messages back to senders with delivery errors, Mail Assure temporarily stores all incoming communications, ensuring no missed business opportunities or customer enquiries. The service maintains your professional reputation by keeping clients unaware of any technical difficulties.

Once your mail server is restored, all queued emails are automatically delivered, ensuring seamless communication flow and minimising business disruption during unexpected downtime.

N-Able Mail Assure is very well priced when compared with competing services and is a small add-on to any existing mailbox:

Mail Assure ServiceProtectionArchivingCommercial 1Nonprofit 2
Mail Assure ProtectionIncludedNot Included£ 1.80£ 1.62
Mail Assure Protection & ArchivingIncludedIncluded£ 3.60£ 3.24
  1. Price per mailbox per month excluding VAT ↩︎
  2. Price per mailbox per month excluding VAT, discounted for non-profits and councils who take up our Community Technology Programme ↩︎

In addition to the monthly costs there is an additional one off platform setup fee of £195 + VAT.

All inbound email is classified according to what content has been detected. In this example only 10 emails have passed the filter – another 20 emails were classified as suspicious including 18 spam, 1 phishing attempt and 1 virus attachment.

We can inspect which items were filtered – here is a list of spam that was rejected. Mail Assure did not even deliver the emails to the customers mail server.

And here is the email that was reject due to a virus detection, safely held back from being delivered from the user.

In this example we see a couple of emails that have been held back as possibly spam and a phishing email – users or admins can choose to have them released from quarantine and delivered to their mailbox, or we can delete them permanently:

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