This got me thinking so I did some serious poking around and as far as I can tell this is a james issue. I can telnet to the gmail server over v6 just fine and I did some playing since I have my own authoritative DNS servers. I made my servers authoritative for the gmail-smtp-in.l.google.com zone which is the zone of all google mail servers and if I have an A record in the DNS mail sends fine. If I only have a AAAA record with no A at all james immediately replies with a failure to send with the error of: There are no DNS entries for the hostname Domain : gmail.com. I cannot determine where to send this message.
Further if I check the james logs it says: Couldn't resolve IP address for discovered host gmail-smtp-in.l.google.com. Despite the fact that there is an IPv6 address james says there is no address at all so I decided to look in the james source code and found this https://github.com/apache/james-project/blob/5e5b4d2a38cb82dcbca431551eb9bd4a891dd642/server/dns-service/dnsservice-dnsjava/src/main/java/org/apache/james/dnsservice/dnsjava/DNSJavaService.java#L435 which might already answer my question. It looks like james for all intents and purposes pretends like IPv6 doesn't exist. It does a lookup for Type.A but I can search the entire code base for Type.AAAA and never find anything. Looks like I need to open a feature request instead of a question unless I'm missing something. On 5/23/20 7:35 AM, David Matthews wrote: >> What does this have to do with my sending domain? v6 is configured on my >> sending domain but that shouldn't matter anyway. > Well it could be, although in your case (scoopta.email?) I don't think it is. > > Another possibility is that it's a linode issue? > > And as it happens I have a linode VM which is currently mailing only a single > daily system report to a gmail address and I notice that gmail is checking > the ipv4 SPF and that's actually not what I would have expected. > > In this instance there is no james involvement, but as I said, I would have > expected this to go over ipv6. I don't especially care and in the past when > things definitely were going over ipv6, I've had problems with the linode > ipv6 address being in a blocklist - definitely not from anything I've done of > course :-) > > Incidentally, I found it impossible to get the ipv6 address out of this block > list and I wondered at the time if whole ipv6 ranges got blacklisted due to > naughtiness from a single address. At the time I solved the problem by > stopping ipv6 in exim4, but that config is not in place at the moment. > > So maybe a linode issue? > > -- > David Matthews > m...@dmatthews.org > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org > For additional commands, e-mail: server-user-h...@james.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: server-user-unsubscr...@james.apache.org For additional commands, e-mail: server-user-h...@james.apache.org
