Although until a few days ago everything worked fine, now I can't send
mail with sendmail to the relay host 'mail.mclink.it'.  I get the following
error:

$ sendmail -v -q -d8.7

Running MAA00454 (sequence 1 of 1)
getmxrr(mail.mclink.it, droplocalhost=1)
getmxrr: res_search(mail.mclink.it) failed (errno=60, h_errno=2)
Federico_Lupi@mail.datasys.it... Deferred: Name server: mail.mclink.it:
host name lookup failure

Dnsquery says the following:

# dnsquery -t MX mclink.it
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8009
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 5
;;      mclink.it, type = MX, class = IN
mclink.it.              1D IN MX        50 relay.eu.net.
mclink.it.              1D IN MX        2 mailhub.mclink.it.
mclink.it.              1D IN MX        5 mail.mclink.it.
mclink.it.              1D IN MX        8 vmail.mclink.it.
mclink.it.              1D IN MX        10 ns2.albacom.net.
relay.eu.net.           15h48m34s IN A  134.222.91.10
mailhub.mclink.it.      1D IN A         195.110.128.6
mail.mclink.it.         1D IN A         195.110.128.30
vmail.mclink.it.        1D IN A         195.110.128.11
ns2.albacom.net.        1d15h48m34s IN A  212.17.192.209

In my /etc/sendmail.cf if have:

# "Smart" relay host (may be null)
DSmail.mclink.it

My provider (mclink) couldn't help me until now.  I am using 1.4.2
with the default sendmail.  I have not changed my configuration
files so I don't understand why things stopped working.

TIA

Federico Lupi