Yes, please take good notice of that! Some time ago I have made a lot of effort to delete all dangling CNAME and MX records, hundreds of them. Apparently there have been cleanups where entire subnets worth of A records were deleted, but many MX and CNAME records still referred to them. It looks like at some time, for every A record created in certain US subnets, a corresponding MX record (just "call IN MX 10 call") had been created. A bit pointless, but worse is that those were not removed when the A records were removed. This time around, please make sure that whenever some record is removed, all records that point to it are also removed. As Jann correctly points out, there are MX records that point to external servers (although sometimes the trailing period was forgotten, making them inoperative). During the above cleanup, I found several of those that do not exist in DNS anymore, and deleted them as well. I did not check if the ones that still resolve would offer SMTP service and would accept mail to the specific domain name (in .ampr.org!). Probably lots of them don't. This weekend I sent out a mailing about renewing registration by tacking @amsat.org @veron.nl and @vrza.nl to all callsigns (the latter are two amateur societies here) and of course I got many delivery failures back where the address at the aliasing service exists, but the address the mail is forwarded to no longer exists. We are not the only one with this cleanup problem... Rob