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 ...
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, means that the receiving server should accept the email...
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 ...
An SPF record is a DNS TXT record containing a list of all the authorized mail servers for your website. Learn how to use SPF records here.
If it's incorrect or the tag is missing, the SPF record will be ignored. IP4 This tag should include all the IPv4 addresses that are allowed to send emails on behalf of the domain. IP6 This tag should include all the IPv6 addresses that are allowed to send emails on behalf of the ...
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) tha...
This SPF record allows any host in the 32 address subnet which contains 192.168.0 to send mail for this and any host virtual domain, for instance, vhost1.com in the above example. NOTE: while /27 allows 32 IP addresses subnet rules remove 192.168.0.0 and 192.168.0.31 as the network and...
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 authorised IP addresses. Because IP addresses can be IPv4 or IPv6, you can define both versions in an SPF record. Each...
Use-n ipor--nameserver ipto specify an IPv4 or IPv6 address of a, possibly external, recursive nameserver to use for an SPF policy evaluation instead of using the system default settings. Specify multiple nameservers by repeating the option with different IP addresses, in which case they will...
EasyDMARC.comis another website with a simple Online SPF Record Checker. This simple tool takes the domain URL as an input and validates the SPF record for the same. In the output, it performs multiple lookups on the domains. This includes a list of IP addresses that are associated with ...