Tried the developers/proposed checkoff, but the 239systemd.. package is still not available. In any case, Ubuntu 18.04 has problems connecting with smtp.comcast.net (through evolution, recommended port 587). The error trying to send an email is:
An error occurred while sending, how do you want to proceed... "The reported error was "Could not connect to smtp.comcast.net: Network is unreadable". But of course it is, ping and dig both work (see below). Note that unlike the pop3, imap, (and mail) .comcast.net names, smtp DNS lookup results are small, one CNAME and one A , so bug 1804487 probably does not apply. $ ping smtp.comcast.net PING smtp.g.comcast.net (96.114.157.81) 56(84) bytes of data. 64 bytes from omta-po.sys.comcast.net (96.114.157.81): icmp_seq=1 ttl=56 time=39.3 ms 64 bytes from omta-po.sys.comcast.net (96.114.157.81): icmp_seq=2 ttl=56 time=40.6 ms $ dig smtp.comcast.net ; <<>> DiG 9.11.3-1ubuntu1.3-Ubuntu <<>> smtp.comcast.net ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39553 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;smtp.comcast.net. IN A ;; ANSWER SECTION: smtp.comcast.net. 3185 IN CNAME smtp.g.comcast.net. smtp.g.comcast.net. 18 IN A 96.114.157.81 ;; Query time: 14 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) ;; WHEN: Thu Dec 20 15:00:52 PST 2018 ;; MSG SIZE rcvd: 82 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1805027 Title: systemd-resolved can't resolve Comcast mail server addresses Status in systemd package in Ubuntu: Triaged Bug description: 1) Ubuntu release: 18.10 2) systemd-resolved version: (Default latest version that comes with Ubuntu 18.10) 3) Expected behavior: Comcast's POP3 mail server addresses to be resolved to IP addresses 4) Actual behavior: Comcast's POP3 mail server addresses can't be resolved to IP addresses Starting on Monday, November 19, 2018, Comcast made a DNS change related to its POP3 mail servers (mail.comcast.net and pop3.comcast.net) that prevent resolved from being able to resolve those domains into IP addresses. When I try to ping either host (mail.comcast.net or pop2.comcast.net), I get this error: tom@deathstar:~$ ping mail.comcast.net ping: mail.comcast.net: Name or service not known tom@deathstar:~$ When I manually lookup up the domain, I get these results: tom@deathstar:~$ nslookup mail.comcast.net Server: 127.0.0.53 Address: 127.0.0.53#53 Non-authoritative answer: mail.comcast.net canonical name = imap.ge.xfinity.com. Name: imap.ge.xfinity.com Address: 96.118.242.209 Name: imap.ge.xfinity.com Address: 96.118.242.197 Name: imap.ge.xfinity.com Address: 96.118.242.233 Name: imap.ge.xfinity.com Address: 96.118.242.225 Name: imap.ge.xfinity.com Address: 96.118.242.226 Name: imap.ge.xfinity.com Address: 96.118.242.217 Name: imap.ge.xfinity.com Address: 96.118.242.208 Name: imap.ge.xfinity.com Address: 96.118.242.230 Name: imap.ge.xfinity.com Address: 96.118.242.232 Name: imap.ge.xfinity.com Address: 96.118.242.218 Name: imap.ge.xfinity.com Address: 96.118.242.211 Name: imap.ge.xfinity.com Address: 96.118.242.242 Name: imap.ge.xfinity.com Address: 96.118.242.221 Name: imap.ge.xfinity.com Address: 96.118.242.196 Name: imap.ge.xfinity.com Address: 96.118.208.40 Name: imap.ge.xfinity.com Address: 96.118.208.99 Name: imap.ge.xfinity.com Address: 2001:558:fc11:9:f816:3eff:fee8:4f07 Name: imap.ge.xfinity.com Address: 2001:558:fc11:9:f816:3eff:fe7d:1b0c Name: imap.ge.xfinity.com Address: 2001:558:fc11:9:f816:3eff:fe25:5ae5 Name: imap.ge.xfinity.com Address: 2001:558:fc11:9:f816:3eff:fef6:babc Name: imap.ge.xfinity.com Address: 2001:558:fc11:9:f816:3eff:fe87:c172 Name: imap.ge.xfinity.com Address: 2001:558:fc11:9:f816:3eff:fee6:7a57 Name: imap.ge.xfinity.com Address: 2001:558:fc11:9:f816:3eff:fe0f:a4a Name: imap.ge.xfinity.com Address: 2001:558:fc11:2:f816:3eff:fec7:cb93 Name: imap.ge.xfinity.com Address: 2001:558:fee2:1000:f816:3eff:fe42:4f14 Name: imap.ge.xfinity.com Address: 2001:558:fc18:0:f816:3eff:fe33:9aaa Name: imap.ge.xfinity.com Address: 2001:558:fc18:0:f816:3eff:feb2:8c0d Name: imap.ge.xfinity.com Address: 2001:558:fc18:0:f816:3eff:fef1:25a5 Name: imap.ge.xfinity.com Address: 2001:558:fc18:0:f816:3eff:febd:320a Name: imap.ge.xfinity.com Address: 2001:558:fc18:0:f816:3eff:fe36:aba3 Name: imap.ge.xfinity.com Address: 2001:558:fc18:0:f816:3eff:fe3f:76f2 Name: imap.ge.xfinity.com Address: 2001:558:fc18:0:f816:3eff:fe45:1d1e tom@deathstar:~$ dig mail.comcast.net ; <<>> DiG 9.11.4-3ubuntu5-Ubuntu <<>> mail.comcast.net ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15037 ;; flags: qr rd ra; QUERY: 1, ANSWER: 17, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;mail.comcast.net. IN A ;; ANSWER SECTION: mail.comcast.net. 15 IN CNAME imap.ge.xfinity.com. imap.ge.xfinity.com. 12 IN A 96.117.3.119 imap.ge.xfinity.com. 12 IN A 96.117.3.96 imap.ge.xfinity.com. 12 IN A 96.117.3.143 imap.ge.xfinity.com. 12 IN A 96.117.3.145 imap.ge.xfinity.com. 12 IN A 96.117.3.129 imap.ge.xfinity.com. 12 IN A 96.117.3.148 imap.ge.xfinity.com. 12 IN A 96.117.3.201 imap.ge.xfinity.com. 12 IN A 96.117.3.136 imap.ge.xfinity.com. 12 IN A 96.118.133.238 imap.ge.xfinity.com. 12 IN A 96.117.3.128 imap.ge.xfinity.com. 12 IN A 96.117.3.144 imap.ge.xfinity.com. 12 IN A 96.117.2.238 imap.ge.xfinity.com. 12 IN A 96.117.3.110 imap.ge.xfinity.com. 12 IN A 96.117.3.140 imap.ge.xfinity.com. 12 IN A 96.117.3.154 imap.ge.xfinity.com. 12 IN A 96.117.3.132 ;; Query time: 13 msec ;; SERVER: 127.0.0.53#53(127.0.0.53) ;; WHEN: Tue Nov 20 06:58:31 PST 2018 ;; MSG SIZE rcvd: 334 tom@deathstar:~$ Before November 19, 2018, everything was working fine. The initial indication there was a problem was Mozilla Thunderbird failed to connect to Comcast's POP3 mail server. Once I did some investigation, I found the information above. I have since disabled system-resolved and have installed "Unbound". After installing "Unbound", I'm able to ping "mail.comcast.net" without issue and Mozilla Thunderbird can contact successfully Comcast's POP3 mail servers. I started a thread about this on Ubuntuforums.org: https://ubuntuforums.org/showthread.php?t=2406399 and others report being impacted by this as well. Let me know if more information is needed! Thanks! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1805027/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
