This depends on the TTL (time-to-live) that you have set for your records.
Emubox uses the following standard values:
| Record Type | TTL in seconds |
|---|---|
| A, CNAME, TXT, SRV | 300 |
| MX | 3600 |
The value is given in seconds. A record with TTL 300 corresponds to 5 minutes. No later than this time, the change is active.
Why do I need a TTL?
The TTL is the "time frame" for how long a nameserver is allowed to cache a record. Once this time has elapsed, the nameserver is required to query / resolve the record again. After that, the new result will also be cached for as long as the TTL specifies.
Thus, newly set mail servers will be addressed externally after a maximum of one hour, based on the above example.
Note: Not all nameservers will see your change equally quickly.
This is again related to the TTL. If an A record with TTL 300 has been changed, it can take 1-300 seconds for a foreign nameserver to receive this result.
This is again related to the TTL. If an A record with TTL 300 has been changed, it can take 1-300 seconds for a foreign nameserver to receive this result.