Errata
The errata list is a list of errors and their corrections that were found after the product was released.
The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.
Color Key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update
| Version | Location | Description | Submitted by | Date submitted |
|---|---|---|---|---|
| Other Digital Version | Errata in errata | • Errata for p. xvii: Type should be Update, not Typo. • Errata for p. xiii: Duplicated. • Errata for p. 68: Truncated. • Errata for p. 325: Duplicated. • Errata for p. 368: Duplicated. • Errata for p. 502: Duplicated twice. |
Jim Syler | Feb 23, 2018 |
| Page 99 2nd paragraph |
"If your SPF records are very long and complex, they may exceed the maximum length of a TXT record’s data, 255 bytes. In that case, you can break the record into multiple TXT records, each beginning with the v=spf1 tag. They’ll be concatenated before evaluation." This might be a trap. According to RFC4408 which defines the SPF specification, it says: 3.1.2. Multiple DNS Records A domain name MUST NOT have multiple records that would cause an authorization check to select more than one record. See Section 4.5 for the selection rules. |
Anonymous | Apr 01, 2015 |