Updating nameservers failed please try again 421
10-Nov-2017 02:26
If the database becomes corrupted, the world comes to an end.To recover delete (NOT: truncate) the file and do "postfix reload".This is the default with Postfix version 2.6 and earlier.
Examples: Enable caching of failed address verification probe results.Unnecessary changes are likely to impair the operation of the mail system.