Problema nell'invio di mail a domini gmail

Question

Buongiorno, dal mio programma Microsoft Outlook improvvisamente non riesco piú a raggiungere diversi indirizzi con dominio @gmail.com. Le mail mi tornano sempre indietro con un messaggio di errore del tipo: "This is the mail system at host paganini01.register.it Delivery to the following recipient failed: xyz@gmail.comThe error returned from the remote server is/was:550-5.7.26 This mail is unauthenticated, which poses a security risk to the Message internal id: kkR5qWU3f2em5kkRAqMMXe". Come posso fare per risolvere il problema? grazie

Answer 1

Hi, I'm Diane and I'm happy to help you today.

You are using Outlook desktop software but not an outlook.com address?

Are you using a custom domain address you own?

That message usually means your domain does not have SPF or DMARC records in DNS.

SPF is a TXT record - it will look something like this but with your email server listed instead of outlook.com v=spf1 include:outlook.com -all

A DMARC record is a TXT record in your DNS - this is a good general use entry: use _dmarc as the name and v=DMARC1; p=quarantine as the data. ns.

You can check your DNS records at mxtoolbox.com - they also have an SPF generator - https://mxtoolbox.com/SPFRecordGenerator.aspx

Let us know how it goes, we're here to help you further if needed.

-- Diane

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