Greetings and happy holidays!
Sorry to bump this old thread, but I'm encountering the same issue on SME 9.2 with qmail (1.03-23.el6.sme@smeupdates-testing) for one particular host: usace.army.mil
2019-12-20 01:42:26.313099500 starting delivery 4751: msg 81789691 to remote redacted@usace.army.mil
2019-12-20 01:42:26.313104500 status: local 0/20 remote 1/20
2019-12-20 01:42:46.334695500 delivery 4751: deferral: CNAME_lookup_failed_temporarily._(#4.4.3)/
# nslookup usace.army.mil
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
*** Can't find usace.army.mil: No answer
# dig usace.army.mil MX
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6_10.3 <<>> usace.army.mil MX
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54395
;; flags: qr rd ra; QUERY: 1, ANSWER: 10, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;usace.army.mil. IN MX
;; ANSWER SECTION:
usace.army.mil. 1291 IN MX 10 pri-jeemsg.eemsg.mail.mil.
usace.army.mil. 1291 IN MX 20 sec-jeemsg.eemsg.mail.mil.
usace.army.mil. 1291 IN MX 30 gw1.usace.army.mil.
usace.army.mil. 1291 IN MX 30 gw2.usace.army.mil.
usace.army.mil. 1291 IN MX 30 gw3.usace.army.mil.
usace.army.mil. 1291 IN MX 30 gw4.usace.army.mil.
usace.army.mil. 1291 IN MX 30 gw5.usace.army.mil.
usace.army.mil. 1291 IN MX 30 gw6.usace.army.mil.
usace.army.mil. 1291 IN MX 30 gw7.usace.army.mil.
usace.army.mil. 1291 IN MX 30 gw8.usace.army.mil.
;; Query time: 78 msec
Is there any workaround to allow my users to send to a mailbox at usace.army.mil ?
Thanks!