Anyone know when ia.usda.gov, ia.nacdnet.net, ams.usda.gov, fs.fed.us,
aphis.usda.gov, usda.gov, and nist.gov started having a dual-stacked MX
record? Our monitoring system notified us this morning that a message from
a customer couldn't deliver there:
Site ia.usda.gov (2a01:111:f400:7c10::10) said after data sent: 450
4.7.26 Service does not accept messages sent over IPv6
[2607:fe28:0:4000::10] unless they pass either SPF or DKIM validation
(message not signed)
Site ia.usda.gov (2a01:111:f400:7c0c::11) said after data sent: 450
4.7.26 Service does not accept messages sent over IPv6
[2607:fe28:0:4000::10] unless they pass either SPF or DKIM validation
(message not signed)
Site ia.usda.gov (2a01:111:f400:7c10::1:10) said after data sent:
450 4.7.26 Service does not accept messages sent over IPv6
[2607:fe28:0:4000::10] unless they pass either SPF or DKIM validation
(message not signed)
to=2a01:111:f400:7c09::11 TCPWrite failed 0/63998, tot=65608 upto=0
0 sec Err Code Zero write_timed3.1 0sec (450 4.7.26 Service does not accept
messages sent over IPv6 [2607:fe28:0:4000::20] unless they pass e) 0 Err
Code Zero write_timed1 104 r=0 r=0
I've asked our customer's IT consultant to add our email servers to their
existing SPF record, but this is the first time I've run into this. Going
back 30 days in my email servers logs it started September 24.
Frank
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