Running in DEMO mode is free for as long as it takes. Support nominally is in California, but the actual programmers are in Russia.įor those still actually using MS email clients, they can replace an exchange server, too. Millions of customers are not a problem - it is a carrier class product. Ask if they also still get their old paycheck, too.Ĭommunigate Pro by Stalker is a wonderful server. So your inability to get reverse has ONLY to do with your IP ADDRESS / BANDWIDTH provider, NOT your DNS provider.īut if your IP provider is using an unusual mode of delegation, THEN be sure your DNS provider allows things such as PTR records in forward zones.Īs for folks saying they use GMAIL, do remember they have programmers that came for the NSA. Or as a FQDN and spelled out so there is also a trailing period:Īnd presumably you also have in the zone these two:Īnd if you want any random emailed to subdomain to get to your server, also add In your zone file you then have the actual PTR record that normally would have been in an in-addr.arpa zone file: You could equally well use the name"dog-shit" as long as it didn't conflict with host names you already were using. That simply says to go ask at about the arbitrary but self describing name "rev-1-2-3-4" He has the 3.2.1.in-addr.arpa zone and in it, has a CNAME record, rather that a PTR record for "host" 4 I'll show delegating just this one, but your ISP might delegate reverse lookup for all 8 addresses if he chooses to. Your email server is at 1.2.3.4 and it is in a /29. MicroSlush's early attempts at DNS servers gagged on what BIND routinely does well, but I assume by now, even MS has it figured out. Some purists sneer at that, but some of us have been doing just that since before that RFC, and it works well. The RFC also pays brief lip service another game that doesn't stay in IN-ADDR space and, in fact, can alias the reverse lookup into one of your normal forward zones. It provided a mechanism for delegating any size block even on non octet boundary, and as small as a /32 - a single IP - and still keep it in the IN-ADDR space. That all changed, in theory, when the "CLASSLESS IN-ADDR" RFC first surfaced. If you are MASTER, he can still be a slave and echo for you. ARIN then plugs in the NS records for that /24. If your ISP has less that a /16, he can't directly delegate a /24 in the classic way, but CAN, when he SWIPs the space to you in ARIN's database (see ARIN.NET's ASSIGN and ALLOCATE templates), he indicatesYOUR name servers and/or his for the space. Typically, in-addr.arpa delegation is on octet boundaries, so inless you have a /24 or larger they won't delegate it to your server. You own DNS service provider or your own DNS server typically only has your domain names and any subdomains, but has NO WAY to do reverse DNS unless your bandwidth ISP has either delegated the reverse lookup to your DNS server or is providing the reverse you need for you. "Just switched to 1 and 1, I wanted to use them as registrar, web host and DNS host but they can not provide a reverse DNS entry for my internal email server unless I have a hosted server with them" I have run in-house Exchange systems previously, and - this is my opinion only - they are just not worth it for organizations with less than 100 people. This also benefits smartphone and iPhone users as well. I don't have to worry about extending RPC over HTTPS for OWA or unnecessary VPN connections. Plus, with our hosted environment, email is available to anyone, anywhere that can create an IMAP or POP3 connection. At my previous place, we spent as much on a single spam appliance as Spiceworks does on annual hosting. Once you factor in the cost of the software (typical Exchange installation can be around $5000), hardware, archive systems,spam/malware protection, and people costs, it is almost a no-brainer to spend between $6 and $10 per mailbox per month. Spiceworks is currently using a hosted Zimbra system from Amicus ( https:/ / The main advantages, for me as an administrator, are the removal of the day-to-day headaches involved in managing an email system (malware protection, backup/archive, compliance, uptime) and the inordinate costs associated with in-house systems.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |