ADFENO By the looks of Openmailbox Forum https://www.openmailbox.org/forum/viewtopic.php?id=1437 Quite some other users are having issues https://trisquel.info/en/forum/problems-acceding-openmailboxorg
You could try to Ping your IMAP/POP servers here's the result of Ping for http://whois.domaintools.com/openmailbox.org # ping -c 10 62.4.1.33 PING 62.4.1.33 (62.4.1.33) 56(84) bytes of data. 64 bytes from 62.4.1.33: icmp_seq=1 ttl=54 time=45.0 ms 64 bytes from 62.4.1.33: icmp_seq=2 ttl=54 time=44.3 ms 64 bytes from 62.4.1.33: icmp_seq=3 ttl=54 time=44.1 ms 64 bytes from 62.4.1.33: icmp_seq=4 ttl=54 time=44.7 ms 64 bytes from 62.4.1.33: icmp_seq=5 ttl=54 time=44.0 ms 64 bytes from 62.4.1.33: icmp_seq=6 ttl=54 time=43.8 ms 64 bytes from 62.4.1.33: icmp_seq=7 ttl=54 time=44.3 ms 64 bytes from 62.4.1.33: icmp_seq=8 ttl=54 time=44.0 ms 64 bytes from 62.4.1.33: icmp_seq=9 ttl=54 time=44.7 ms 64 bytes from 62.4.1.33: icmp_seq=10 ttl=54 time=44.2 ms --- 62.4.1.33 ping statistics --- 10 packets transmitted, 10 received, 0% packet loss, time 9010ms rtt min/avg/max/mdev = 43.801/44.349/45.031/0.400 ms
