Differences

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--- email:errors [2016/11/29 16:50] – created peter
+++ email:errors [2019/11/27 21:52] (current) – removed peter
@@ Line 1: / Line 1: @@
-====== Email - Errors ======
-===== 421 DNS:NR =====
-This error is caused because the IP of the server that sent the mail does not have a reverse lookup configured so that the IP can be translated to a name or, reverse resolution does not match the hostname.  This reverse resolution must be configured by your ISP.
-===== 550 5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table =====
-This error indicates that the system failed to find the specified user in the domain.  You should make sure that the email address you have is correct.
-===== 550 5.7.1 Sender ID/SPF failed from IP XXX.XXX.XXX.XXX =====
-This error indicates that the server that sent the mail server is not listed as authorized to send mail for that domain according to the domain SPF record.
-If it is a legitimate email sent from one of your servers, you should check the SPF record and correct it so that it can validate and deliver mail.