Hi, If I was you; I would start by fixing your SPF.
This will show you the errors https://mxtoolbox.com/SuperTool.aspx?action=spf%3aheartland.com.au&run=toolpage Andrew From: AusNOG <[email protected]> On Behalf Of Christopher Scholfield Sent: Tuesday, 19 October 2021 7:04 AM To: 'AusNOG Mailing List' <[email protected]> Subject: [AusNOG] Anyone knowledgeable from Mimecast here who can contact me off list? Yesterday we changed mail filters, Mimecast is the only email provider that has been rejecting our emails due to SPF problems for the last 20 odd hours. Mimecast technical support has told me their customers who aren’t getting our emails need to contact them so their tech support can explain how to bypass their mail filters for our mail server. I’d rather work with someone at Mimecast to resolve the cause of the problem. Thanks in advance. Christopher Scholfield Systems Administrator | Heartland Motors 18-20 Chicago Ave, Blacktown T: 02 8811 0800 F: 02 9671 4055 E: [email protected]<mailto:[email protected]> [cid:[email protected]]<http://>
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