SpamTitan allow SPF verification. It can be enabled in:
​System Setup > Mail Relay > Sender Controls.

When enabled there is an exemption list where you can IP addresses of mail servers which you want to be exempt from the SPF test.
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For more information please click the button below.

You can enable DKIM in SpamTitan through:
System Setup > Mail Relay > DKIM.
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For more information please click the button below.

Create a free OnDMARC account to test your configuration.

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