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TTL: 3600 (or your provider default) Save the record, and then remove any other MX records. Host Name: Points to address: Copy the value from the admin center and paste it here.
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Finally, the TTL change itself takes time to propagate, which follows the same SLA as other zone file changes (2 hrs to 24 hrs to propagate fully, but usually faster).īorn2Frag's suggestion of creating a higher priority MX should create a new propagation, and it may happen faster. Record Type: MX Priority: Set to the highest value available, typically 0. If the zone file is set for 3600, then changed to 600, 10 minutes later there will still be caches out there that will show the TTL is 50 minutes away if they did the lookup just before you changed it.
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Some DNS providers (Network Solutions, GoDaddy for example) don't even let you set anything below 3600.Īlso, the TTL timer starts when the client lookup happens. In the Reflexion Management Portal, click Enterprise > Enterprise Domains > Add domain or click the icon under the Edit column and change your existing entry. Typically, their MX records are in the form of. Doing it every 10 min for everyone who sets that, can cause a large load on upstream DNS servers particularly from large hosts. Office 365 should provide you an inbound MX record. 600 (seconds) is the shortest possible TTL, but I've heard of some services ignoring it and setting TTL internally for 1200, 1800 or higher because in day-to-day life, few are actually moving their services to new IP addresses that fast or often.