“v=spf1” is the version of the SPF record used The “include:” tag lets your SPF record the addresses of authorized domains. The “ip4” tag includes IPv4 addresses, and you can also use the “ip6” tag if you use IPv6 addresses The “~all” tag, or the soft fail qualifier, ...
The IP4 tag in an SPF record is a critical element that specifies authorized IPv4 addresses for sending emails to a domain. It’s crucial for email security and deliverability. By clearly specifying which IP addresses can send emails, you reduce the risk of email spoofing and phishing attacks ...
For instance, "ip4:" precedes an IPv4 address range. An example SPF record might authorize email from specific IP addresses with "v=spf1 ip4:192.0.2.0/24 -all." What does an SPF record look like? SPF records appear as a single line of text within a DNS TXT record. It consists of t...
the domain SPF is returned from asender-domainquery using thesender's email e.g.sender= info@example.comsender-domain= example.com. The SPF record allows any host in the 32 address subnet which contains 192.168.0.3 to send mail for this and any host virtual domain e.g virtual1.com in ...
SPF Record: Notes: Do not enclose in quotes. Input something like v=spf1 a mx ~all.Except for %d, does not currently support records that include macros. Test an SPF record This test is for evaluating the performance of your record based on different IP addresses that mail might come...
A mechanism is a way to specify a range of IP addresses. Eight mechanisms are defined: IP4: If the sender is in a given IPv4 address range, match; IP6: If the sender is in a given IPv6 address range, match: A: If the domain name has an address record (A or AAAA) th...
A mail server will compare the IP address of the sender against the IP addresses defined in the mechanisms. If the IP address matches one of the mechanisms in the SPF record then follow the result handling rule. The default handling rule is + or pass....
This text identifies the TXT record as an SPF TXT record. ipv4: or ipv6: indicates the type of IP address that you're using. Typically, the IP addresses that you specify are the outbound email servers for your organization. Instead of individual IP addresses, you can also sp...
SPF Record Example An SPF record has more than just an IP address. It also instructs the recipient server on what to do if the sender IP doesn’t match the list of authorized IP addresses. Because IP addresses can be IPv4 or IPv6, you can define both versions in an SPF record. Each...
For IPv4 addresses, both the "i" and "c" macros expand to the standard dotted-quad format.For IPv6 addresses, the "i" macro expands to a dot-format address; it is intended for use in %{ir}. The "c" macro may expand to any of the hexadecimal colon-format addresses specified in [...