Koozali.org: home of the SME Server

SPF check

Offline simone686

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SPF check
« on: October 19, 2022, 11:45:38 AM »
Ho sempre usato, felicemente, Fetchmail su Sme...

Adesso dopo aver installato nextcloud, ed un certificatoi let's encrypt per un nome di  dominio (dinamico xxxx.ddns.net di No-ip.org)
associato al mio ip pubblico statico, ho deciso di provare. il server di posta integrato.

Ricevo mail regolarmente, ma in invio verso gmail.com ricevo questo errore...

Remote host said: 550-5.7.26 This message does not pass authentication checks (SPF and DKIM both
550-5.7.26 do not pass). SPF check for [newtekmail.ddns.net] does not pass with
550-5.7.26 ip: [].To best protect our users from spam, the message
550-5.7.26 has been blocked. Please visit

Cosa posso fare?

Offline mmccarn

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Re: SPF check
« Reply #1 on: October 19, 2022, 12:53:43 PM »
SPF is a system that lets you, as the domain owner, specify what servers on the internet are allowed to send email that claims to come from your domain name.

You need to create an SPF record for your domain:

If your SME does not have a fixed IP address you will need to solve that problem, too.

You can:
- get a fixed IP address for the SME server's internet connection
- Use a dynamic DNS service to provide a consistent dns name for your SME server when the IP address changes
- Relay your outgoing email through another system (then configure your SPF record to include the SPF details of that system)