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oneSpamExperts · Cloud filtering + AI mail gateway · Priced per domain

oneSpamExperts: spam filtering that also reads the email the way a person would.

SpamExperts cloud filtering plus our own AI gateway, which judges what the filters cannot decide and tells newsletters from fraud. It works in front of Microsoft 365, Google Workspace or your own mail server.

Filtering plans How mail flows

How incoming mail is filtered

  1. InternetMail addressed to your domain
  2. Cloud filteringSpamExperts filters, blocklists and virus scanning
  3. One Sign AI gatewayAntivirus, scoring and AI classification of what remains
  4. Your mailboxesMicrosoft 365, Google Workspace or your own server

oneSpamExperts plans

Choose the direction you need filtered

Every plan includes both layers, cloud filtering and the One Sign AI gateway, and is set up and supported by our team. Priced per domain, with no limit set per mailbox.

Free with One Sign email, hosting or servers. oneSpamExperts Incoming & Outgoing is included at no charge for domains whose mail, website or server is hosted by One Sign. The prices below apply when your mail is hosted elsewhere, such as Microsoft 365 or Google Workspace.

Incoming

oneSpamExperts Incoming

Checks every message before it reaches your mail server.

US$136 per domain / month

or US$1,359 per domain / year

  • Spam, phishing and virus filtering
  • Mail held in a queue if your server is unavailable, then delivered when it is back
  • Quarantine with allow and block lists

Outgoing

oneSpamExperts Outgoing

Checks mail leaving your organisation.

US$136 per domain / month

or US$1,359 per domain / year

  • Stops spam and viruses sent from a compromised account or device
  • Protects your domain and server reputation, so your mail keeps reaching inboxes

Both directions

oneSpamExperts Incoming & Outgoing

Both filters for the same domains, managed together.

US$136 per domain / month

or US$1,359 per domain / year

  • Everything in the incoming and outgoing filters
  • One set-up and one point of contact for both directions
  • AI classification on incoming mail

Prices in US dollars per domain, for mail hosted outside One Sign. Free for domains on One Sign email, hosting or servers. Order by email with the domains to protect and your current mail provider; we reply with the invoice and the set-up steps.

AI mail gateway

The AI layer in every oneSpamExperts plan

We built and run this gateway ourselves, and One Sign’s own mail goes through it every day.

  • Proven filters firstSPF checks, greylisting, Spamhaus and SpamCop blocklists, and SpamAssassin scoring with a trained Bayes filter
  • AntivirusAttachments scanned with ClamAV
  • AI for the hard casesMessages the filters cannot decide are classified as genuine, marketing, spam, phishing or malware
  • Marketing labelled, not lostNewsletters are delivered with a [Marketing] tag and a link to block that sender
  • Spam and fraud quarantinedSpam, phishing and malware held for 30 days, so a wrongly caught message can be released
  • Shared threat intelligenceA malicious message confirmed on one gateway is blocked on the others straight away

Privacy: the AI sees only a shortened copy of the text, with addresses and numbers masked. Repeat messages reuse the earlier result.

Getting started

Moving a domain onto filtering

  1. We add your domain and the mail server that should receive the clean mail.
  2. You change the MX records, or we change them for you if we manage your DNS.
  3. Old routes are closed: with Microsoft 365 or Google Workspace we set a connector that only accepts mail from the filter, so spam cannot go around it.
  4. We watch the first day of traffic and adjust allow and block lists with you.

Filtering starts once the new MX records take effect. Nothing is installed on your mail server or staff computers.

Questions

Frequently asked

Do we have to change our email provider?

No. Filtering sits in front of Microsoft 365, Google Workspace or your own mail server. You change the MX records of your domain; mailboxes stay where they are.

What does the AI see of our email?

Only a shortened copy of the message text, with email addresses and numbers masked, and only for messages the standard filters cannot decide.

What happens to a message that is caught?

Spam, phishing and malware are held in quarantine for 30 days so a wrongly caught message can be released. Newsletters are delivered with a [Marketing] tag instead of being blocked.

Is oneSpamExperts free for One Sign hosting customers?

Yes. Domains whose email, website or server is hosted by One Sign get oneSpamExperts Incoming & Outgoing at no extra charge. The per-domain prices apply to mail hosted elsewhere.

Protect your domain with oneSpamExperts

Send us your domain and current mail provider, and we will propose a set-up.

Email sales@onesign.sg