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Can you send an email without an MX record?
No and yes. By standard, your sender domain is not required to have an MX record. RFC 5321 makes an MX record optional although it’s somewhat of a standard today. However, due to spamming practices, a number of receiving servers may reject your messages when there’s no MX record for the sender’s domain.
Do I need MX in my SPF record?
The v tag is required and represents the protocol version. It MUST be the first tag in the SPF record. if used on its own (mx) then it uses the A record IPs of the MX records for the current domain.
What is MX in SPF record?
1 Answer. The first MX means that the IP addresses in the MX record(s) for the domain you’re actually attaching the SPF record to should be accepted as valid. The second one means that IP addresses in the MX record(s) for the domain mail.mydomain.com should be accepted as valid.
What MX records do?
A DNS ‘mail exchange’ (MX) record directs email to a mail server. The MX record indicates how email messages should be routed in accordance with the Simple Mail Transfer Protocol (SMTP, the standard protocol for all email). Like CNAME records, an MX record must always point to another domain.
What does V spf1 all mean?
Description. “v=spf1 mx -all” Allows the domain’s MX hosts to send mail for the domain, and prohibits all other hosts.
What’s the best way to report a phishing message?
Users should use the Report Message add-in or the Report Phishing add-in to report messages to Microsoft, which can train our system. Admins should also take advantage of Admin Submission capabilities. Multi factor authentication (MFA) is a good way to prevent compromised accounts. You should strongly consider enabling MFA for all of your users.
What happens when Microsoft anti spam is detected?
For questions and answers about anti-spoofing protection, see Anti-spoofing protection FAQ. By default, what happens to a spam-detected message? For inbound messages: The majority of spam is deleted via connection filtering, which is based on the IP address of the source email server.
How to check anti phishing in Microsoft Office?
Specifically, you should check the X-Forefront-Antispam-Report header field in the message headers for indications of skipped filtering for spam or phishing in the Spam Filtering Verdict (SFV) value.
What does the MX record mean on Outlook.com?
An MX record for a domain whose primary MX record doesn’t point to EOP resembles the following. (The MX record does not contain “mail.protection.outlook.com.”) Or, the domain may have EOP as a secondary MX record. (The number in the MX record indicates its priority. High numbers indicate lower priority.