On 2017-04-19 12:36:23 (+0200), Philip Paeps <[email protected]> wrote:
On 2017-04-19 12:15:06 (+0200), David Hofstee
<[email protected]> wrote:
It may have to do with squatted/parked domains and/or port 25 being
closed by a firewall. Parked domains generally have A records for
showing ads but often do not have MX records (or an open port 25).
Instead of getting a bounce immediately, you may have to wait for a
timeout when the sender makes a simple typo.
And then there are cases when parked domains do have port 25 open
and/or an MX record. Different discussion.
The correct way to indicate that a domain does not accept email is to
have an explicit null MX record in the DNS, e.g.:
foo MX 0 .
See RFC 7075.
RFC 7505 actually. Lack of caffeine causes slydexia. :o
Philip
--
Philip Paeps
Senior Reality Engineer
Ministry of Information
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