Every incoming message gets a spam score. In Skyline Mail → Spam & threats you choose the level (Relaxed, Standard, Strict or Maximum) that decides from which score a message goes to the Junk folder and from which it is refused. Standard is recommended. One mailbox can have its own level, and Filtered mail lists what the filter refused or sent to Junk, with the reason.
What you need
- A role that may manage the mail policy. Others can view the settings but not change them.
- Your own two-step code: saving a change to these settings asks for it.
How do I change the spam filter level?
Open Spam & threats. In the console menu open Skyline Mail → Spam & threats. The page is grouped into Spam, Senders and Threats, and each row shows whether it is On, Off or Always on.
Open the spam filter. Select the row Spam filter. The panel explains the scale: below one score mail reaches the Inbox, from that score it goes to the Junk folder, and from a higher score it is refused.
Pick a level. Choose Relaxed, Standard, Strict or Maximum. Custom lets you set the two scores yourself; the Junk score must be lower than the refuse score.
Save. Select Save and confirm with your code. The level applies to all mailboxes that do not have their own level.
Give one mailbox its own level (optional). Open the mailbox under Mailboxes, go to the Mail rules tab and change Spam filter from Organisation level to another level. The Spam & threats page counts these under Mailboxes with their own level.
Check the result. Open Filtered mail to see what was refused or sent to Junk in the last 30 days and why. Nothing is held there: refused mail was returned to its sender, and junk is in the user's Junk folder.
Which level should I choose?
| Level | What it does |
|---|---|
| Relaxed | Only obvious spam goes to Junk. |
| Standard | Recommended. The setting every organisation starts with. |
| Strict | More goes to Junk. Ask people to look in Junk now and then. |
| Maximum | Anything doubtful goes to Junk, and more is refused. |
| Custom | You set the two scores yourself. |
| Off | Suspected spam is no longer sent to Junk. Viruses are still blocked. |
How do users handle the Junk folder?
Each mailbox has a Junk folder in webmail, Outlook and the phone apps. A good message that landed there can be moved back to the Inbox by the user. Ask people to look in Junk now and then, especially on the Strict and Maximum levels, because a message in Junk was delivered but is easy to miss.
Is there antivirus as well?
Yes. Antivirus is managed by Skyline, applies to every message and cannot be switched off. A message with a virus is refused and appears in the mail log with the reason A virus was found.
If something goes wrong
| What you see | What to do |
|---|---|
| Your last change is saved but not on the mail server yet | The console retries every hour; until then the previous settings apply. If the banner stays for more than a few hours, open a support ticket. |
| A customer's messages keep going to Junk | First look at the message in Filtered mail to read the reason. Then consider a lower level for that mailbox on its Mail rules tab. |
| Too much spam reaches the Inbox | Move the organisation to Strict, and tell people that more mail will now land in Junk. |
| You can view these settings but not change them | Changing them needs the Manage mail policy permission. Ask an administrator for a role that includes it. |
Frequently asked questions
Is filtered mail kept somewhere for me to release?
No. Nothing is held. Refused mail is returned to the sender, and suspected spam is delivered to the Junk folder of the mailbox.
Does the spam filter apply to outgoing mail?
The levels on this page are about incoming mail. Outgoing mail is covered by sending limits in Mail policies.
Can I see spam numbers for my organisation?
Yes. Spam & threats shows the totals for the week, and the mail log lets you filter by refused messages.
Related guides
- How to track a message with the Skyline Mail log
- How to set mail policies for every mailbox in Skyline Mail
- How to add your domain to Skyline Mail and pass the MX, SPF, DKIM and DMARC checks
- Why your own emails go to spam, and how to fix it
- How Skyline Cloud works: all guides
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