To complete the scenario, you might need to configure your email server to accept messages delivered by Microsoft 365 or Office 365.Ī connector from your own email server to Office 365 To prepare for this mail delivery scenario, you must set up an alternative server (called a "smart host") so that Microsoft 365 or Office 365 can send emails to your organization's email server (also called "on-premises server"). When you set up Microsoft 365 or Office 365 to accept all emails on behalf of your organization, you will point your domain's MX (mail exchange) record to Microsoft 365 or Office 365. A connector from Office 365 to your own email server.You need two connectors to route email between Microsoft 365 or Office 365 and your email servers, as follows: How do connectors route mail between Microsoft 365 or Office 365 and my own email server? Without connectors, email will not flow between Microsoft 365 or Office 365 and your organization's email servers. If you have your own email servers and Microsoft 365 or Office 365, you must set up connectors in Microsoft 365 or Office 365. When email is sent between Bob and Sun, no connector is needed.(All internet email is delivered via Office 365.) When email is sent between John and Sun, connectors are needed.When email is sent between John and Bob, connectors are needed.John and Bob both exchange mail with Sun, a customer with an internet email account: John has a mailbox on an email server that you manage, and Bob has a mailbox in Office 365. In this example, John and Bob are both employees at your company. The diagram below shows how connectors in Microsoft 365 or Office 365 (including Exchange Online or EOP) work with your own email servers. You can enable mail flow between Microsoft 365 or Office 365 and any SMTP-based email server, such as Exchange or a third-party email server. If you have EOP and your own email servers, or if some of your mailboxes are in Microsoft 365 or Office 365 and some are on your email servers, set up connectors to enable mail flow in both directions. How do connectors work with my on-premises email servers? To learn more about partner scenarios, see Set up connectors for secure mail flow with a partner organization. If you apply the steps described in this article to partner email services, you may have unintended consequences including email delivery failure. Hope this helps someone - Sonicwalls are nice and tight on security - but they can be a little non-obvious at times.Before you get started, make sure to check on your specific scenario in I have my own email servers. Without this last rule, we were having phones drop off constantly - although it was MUCH worse with Grandstream phones than any of the Polycom, Sangoma, or Yealink phones - I guess the Grandstreams are just more sensitive. However, we found out this morning a different scenario - A PBX Hosted in a CoLo behind a Sonicwall with ALL the phones remote to the PBX behind another Sonicwall - Same Rule Set as above, but after the wizard runs, you will need to create a 4th NAT Policy and it needs to look like this: This works fine for phones on the same LAN as the PBX and also for remote phones connecting to the office from offsite. That “Disable Source Port Remap” can be a killer if you are registering to Broadsoft servers - you will find that some (but not all) of your outbound calls fail - turn it on in 2 of the three rules - the third rule created by the wizard won’t let you turn it on. Three NAT policies will be created when implement this using the “Public Server Wizard” - Two of them need the following option set: Under VoIP, enable “Consistent NAT” and disable everything else - Asterisk takes care of it! Set the UDP Timeout on your LAN->WAN Firewall Rule to 300 seconds - the default is 30, but that is too low.
If you want tighter security, find out your ITSP’s address range and restrict the incoming to that source. If you want tighter security, find out your ITSP’s address range and restrict the incoming to that source.Ī Port Forwarding rule of 10000-19999-UDP for the incoming RTP - sometimes you can get away without this rule - depends on the ITSP - Put it in anyway. If you are using a non-standard port, change the rule accordingly. Ok - Wasted quite a bit of time this morning with a new configuration we were trying out and I thought I would post it here so that no one else has to waste the same amount of time that I did this morning.įor a standard setup with a FreePBX/Asterisk PBX onsite, you will need the following on the Sonicwall:Ī Port Forwarding rule of 5060-UDP for the Incoming SIP Trunk - Sonicwalls are very AGGRESSIVE about closing that port, so if you use a SIP trunk and you don’t forward the traffic, you will have problems with inbound calls - outbound will work fine, but skip the drama and put the rule in.
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