Mimecast will actually let you send from another domain you do not own ( will need to open a Support ticket and give a business reason ) Mimecast […]
Tag: SPF
Unable to send email to Teams channel – 365 Smart Hosts
Sending an email to the address stated on your Teams channel, does not come throughYou check with SMTP server and it says delivered correctlyReading a few articles […]
Netsuite – SPF Records
What a mission this was!Oracle netsuite just flat out refuse to give you a list of IP Address’ for their sending servers“Support will not provide a list […]
Valimail – Mostly failing forwarders
Sender Rewriting Scheme (SRS) functionality was added to Office 365 ( and other platforms ) to resolve a problem in which autoforwarding is incompatible with SPF.SRS rewriting […]
Mimecast Holding Items after putting them in Permitted Senders
Search for the message in Mimecast Then Copy the Header to Clipboard and Search for “Fail”You can see any DNS checks it might have failed e.g. :
DNS Authentication – DMARC Fail
Recently had a customer have a bounce back for an email someone tried to send him with the error DNS Authentication – DMARC Fail DMARC Utilises DKIM and SPF […]
Mimecast Recommended SPF, DKIM and DMARC settings – DNS Inbound Authentication
https://community.mimecast.com/docs/DOC-2545#jive_content_id_Inbound_DNS_Authentication_Policy_Configuration You can also tighten down SPF to only allow specific email address to send from third party services instead of whole domain : https://www.jamieweb.net/blog/using-spf-macros-to-solve-the-operational-challenges-of-spf/
Stopping Fraudlent Spoof Emails SPAM
There’s been a new recent wave of spoof emails sent to companies , usually emailed to financial personnel’s pretending to be from the CEO to get quick […]
Office 365 Spam Avoidance
You can forward these emails to : [email protected] or use the Outlook plugin to report and hopefully Microsoft should block these in future : https://www.microsoft.com/en-us/download/details.aspx?id=18275 Microsoft have actually now got […]