What are SPF, DKIM and DMARC?

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Domain authentication

Three rules to prove the email is really yours

SPF, DKIM and DMARC are three authentication systems that let mail servers check that a message really comes from the stated domain.

SPF lists the servers authorised to send for the domain. DKIM adds a digital signature to the message. DMARC sets what to do if the checks fail.

In practice

Why they matter to a company

  • They make it harder to forge the sender.
  • They help email reach its recipients.
  • They need to be configured carefully in the domain's DNS.

For companies in Como, Milan and Lugano they are good general practice. If you would like an opinion on your domain, contact us.

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Portfolio

Projects for companies between Como and Milan

About us

A team in Cantù for your domain

Meet the people who manage your company's domains, email and servers.

Meet the team
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Emails end up in spam because of missing or incorrect domain authentication, suspicious content, poorly maintained recipient lists or a weak sender reputation. From Cantù, the NewVisibility team helps companies in Como, Brianza and Milan understand where their email gets blocked.

To limit emails sent in your company's name, you configure SPF, DKIM and DMARC in the domain's DNS and check the authorised senders. No measure eliminates the risk, but it reduces it considerably, also for businesses between Cantù, Como and Milan.

If a mailbox is compromised, change the password straight away, close active sessions, check forwarding rules and filters and notify your contacts. If you need support in Como, Brianza or Milan, the NewVisibility team in Cantù can help you with the first steps.

Having direct server support means that, when work is needed, NewVisibility does it without going through an outside supplier. From our Cantù office you have a single contact for website and hosting, with people who know your project, in Como, Brianza and Milan.

To check the email migration, you test sending and receiving, compare the folders with the original, check devices and DNS and keep the old system active for safety. NewVisibility, in Cantù (Como), carries out these checks for companies in Como, Brianza and Milan.

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