When FocalPoint tries to email out, we get an "undeliverable" email (Access Hosted Client)

These undeliverable emails suggest that FocalPoint does not have permissions to send emails from your domain.
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This would mean that there is no SPF record for accessacloud.com in your DNS record, which means that applications are unable to send emails on your behalf.
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You will need to ask your IT team to add "spf2.accessacloud.com" and "theaccessgroupSPF.smtp.com" into the DNS record, which will resolve this issue.
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SPF records can be checked by using a website such as https://mxtoolbox.com/SuperTool.aspx.