> -----Original Message----- > From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of centos--- > via CentOS > Sent: Monday, August 27, 2018 9:31 AM > To: centos at centos.org > Subject: Re: [CentOS] Mail has quit working > > > > On 08/27/2018 09:05 AM, TE Dukes wrote: > > > >> -----Original Message----- > >> From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of Richard > >> Sent: Monday, August 27, 2018 7:58 AM > >> To: CentOS mailing list > >> Subject: Re: [CentOS] Mail has quit working > >> > >>> Date: Monday, August 27, 2018 07:42:48 -0400 > >>> From: TE Dukes <tdukes at palmettoshopper.com> > >>> > >>>> From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of > >>>> Richard Sent: Monday, August 27, 2018 7:29 AM > >>> > >>>> > >>>> Since the localhost4 approach worked, commend out the ipv6 > >>>> localhost entries in your /etc/hosts file, then try: > >>>> > >>> IP6 is commented out > >>> > >>>> dig @localhost localhost a > >>> > >>> That works > >>>> > >>>> again. If that works try: > >>>> > >>>> telnet localhost 143 > >>> > >>> This also works > >>>> > >>>> once again. If those work, it would seem that your ipv6 is messed > >>>> up and your system is trying it first and not falling back to ipv4. > >>>> > >>>> Regarding your nameserver list in /etc/resolv.conf. If you have a > >>>> working 127.0.0.1 nameserver you generally don't include external > >>>> nameservers in that list. So, if non-ipv6 things seem to work, I'd > >>>> remove the two non-127 nameservers from that list. > >>>> > >>> Removed the two nameservers. Still can't access mail. Getting > >>> connection to storage server failed on the roundcube login page. > >>>> > >> > >> That you can now successfully get to "localhost" is good progress. > >> Seems you want to stay away from ipv6 networking issues unless/until > >> you resolve whatever that issue is. > >> > >> Roundcube is, potentially, a totally separate issue. I don't use it, > >> so can only suggest minimal debugging ideas. > >> > >> What is the hostname that you use to get to your roundcube instance? > >> Can you resolve that: > >> > >> dig <hostname> a > >> > >> If you get an answer, is the ipnumber correct? > >> > > > > ; <<>> DiG 9.9.4-RedHat-9.9.4-61.el7 <<>> mail.palmettodomains.com a > > ;; global options: +cmd > > ;; Got answer: > > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40652 > > ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 3 > > > > ;; OPT PSEUDOSECTION: > > ; EDNS: version: 0, flags:; udp: 4096 > > ;; QUESTION SECTION: > > ;mail.palmettodomains.com. IN A > > > > ;; ANSWER SECTION: > > mail.palmettodomains.com. 86400 IN A 192.169.1.110 > > > > ;; AUTHORITY SECTION: > > palmettodomains.com. 86400 IN NS > dns1.palmettodomains.com. > > > > ;; ADDITIONAL SECTION: > > dns1.palmettodomains.com. 86400 IN A 192.168.1.110 > > dns1.palmettodomains.com. 86400 IN AAAA aaaa:bbbb::110 > > > > ;; Query time: 0 msec > > ;; SERVER: 127.0.0.1#53(127.0.0.1) > > ;; WHEN: Mon Aug 27 09:01:48 EDT 2018 > > ;; MSG SIZE rcvd: 132 > > > >> Note, if the hostname for your roundcube instance is one of the ipv6 > >> entries in your /etc/hosts file, I'd remove that - and either put in > >> an ipv4 entry or put an entry for it in your dns. > >> > > > > Thanks again! I still think it's a mail issue. I can't get mail using > > usermin either. > > > > Think I'm going to remove the TLS stuff from postfix main.cf that I added > > yesterday and retry. > > If I missed this further up thread my apologies - is SELinux enabled and > are there any relevant exceptions being logged? Pretty sure SELinux is turned off unless it got turned on without my knowledge through an updtate/upgrade. I removed the TLS lines from main.cf I added last night and remotely did a reboot from here at work. Mail is again working!! I am skeptical to mark this thread solved as I thought it was solved back in July. I think, removing my ISP's DNS servers from resolve.conf was the fix, could be removing IPV6 from etc/hosts. Might put it back in just to see. Again, many, many thanks!! I really want to thank everyone for their help and patience!!