You can enable Sender Policy Framework (SPF) to allow Hosted Email Security to evaluate the legitimacy of sender's email address, before delivering the email to the recipient.
The confirmation dialog box only appears if the domain selected in Managed domain is all my domains.
Status |
xheader |
---|---|
Pass |
X-TM-Received-SPF: Pass (domain of example_address@example.com designates 10.64.72.206 as permitted sender) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
Fail |
X-TM-Received-SPF: Fail (domain of example_address@example.com does not designates 10.64.72.206 as permitted sender) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
SoftFail |
X-TM-Received-SPF: SoftFail (domain of transitioning example_address@example.com discourages use of 10.64.72.206 as permitted sender) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
Neutral |
X-TM-Received-SPF: Neutral (10.64.72.206 is neither permitted nor denied by domain of example_address@example.com) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
None |
X-TM-Received-SPF: None (domain of example_address@example.com does not designate permitted sender hosts) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
PermError |
X-TM-Received-SPF: PermError (domain of example_address@example.com uses mechanism not recognized by this client) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
TempError |
X-TM-Received-SPF: TempError (error in processing during lookup of example_address@example.com) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
InternalError |
X-TM-Received-SPF: InternalError (fail to lookup of or get meaning result of example_address@example.com) client-ip=10.64.72.206; envelope-from=example_address@example.com; helo=mailserver.example.com |
If the value of envelope-from is blank, the value of helo will be used instead for the SPF check.