On Thu, Feb 12, 2004 at 11:37:34PM -0800, Greg Connor wrote:
|
| Unfortunately this means all A records also need SPF records. I wonder if
| something like this could give the proper result:
|
| Interesting. Anyway it's probably safer to SPF anything that has either MX
| or A including *
Our MX server boggle recently got this error:
when we tried to send mail to holborn-ed(_at_)real-life(_dot_)tm, the
receiving
host mailgate.real-life.tm[195.11.8.2] said: 550 Sorry, the domain
"boggle.pobox.com" has no MX records. (in reply to RCPT TO command)
so mailgate.real-life.tm has an antispam rule that refuses all sender
domains with no MX records. In a world where the implicit-MX rule was
deprecated, that behaviour would be the norm.
So what did we do? We added MX records to all our mail servers.
I feel a BCP coming on that deprecates the implicit MX rule and
recommends that all envelope sender domains should have an MX record in
addition to an A record. And an SPF record, too, obviously.
If that became the custom, then we wouldn't have to add SPF records for
A-only subdomains.