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<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT
face="Times New Roman"><FONT size=3>BIND 9.6 ‘named’ throws the following
message during startup claiming that it is illegal to use a CNAME/alias in
the MX record. <SPAN style="mso-spacerun: yes"> </SPAN>I beg to
differ.<SPAN style="mso-spacerun: yes"> </SPAN>There is no such standard
nor requirement prohibiting the use of CNAME/alias in an MX
record.</FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT face="Times New Roman"
size=3></FONT></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT face="Times New Roman"
size=3>Message thrown at startup:</FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT size=3>"named[3307]:
zone <EM>MyDomain</EM>.com/IN: <EM>MyDomain</EM>.com/MX
'MX1.<EM>MyDomain</EM>.com' is a CNAME (illegal)"</FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT
face="Times New Roman"><FONT size=3>Additionally in Chapter 6 – BIND
Configuration Reference, Zone File, Discussion of MX Records states the MX
records “must have an associated address record (A or AAAA) – CNAME is not
sufficient.”</FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT
face="Times New Roman"><FONT size=3>Some people seem to think RFC 974 creates a
standard which prohibits the use of CNAME/alias in MX records. <SPAN
style="mso-spacerun: yes"> </SPAN>But very much to the contrary RFC
974 demonstrates that CNAME/alias is permitted in MX
records.</FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT
face="Times New Roman"><FONT size=3>ISC’s message that a CNAME/alias in an MX
record is illegal is incorrect and just an attempt by ISC to get people to go
along with what is only a perceived rather than actual standard/requirement, and
should be removed so as not to further the fallacy of this perceived perception
of a standard/requirement, as it is neither a standard nor a requirement, and
certainly not illegal.</FONT></FONT></SPAN></P>
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style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT
face="Times New Roman"><FONT size=3></FONT></FONT></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><FONT
face="Times New Roman"><FONT size=3>Al Stu<o:p></o:p></FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; tab-stops: 36.75pt 73.5pt 110.25pt 147.0pt 183.75pt 220.5pt 257.25pt 294.0pt 330.75pt 367.5pt 404.25pt 441.0pt 477.75pt 514.5pt 551.25pt 588.0pt 624.75pt 661.5pt 698.25pt 735.0pt 771.75pt 808.5pt 845.25pt 12.25in 918.75pt 955.5pt 992.25pt 1029.0pt 1065.75pt 1102.5pt 1139.25pt 1176.0pt; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Courier New'"><o:p><FONT
face="Times New Roman" size=3> </FONT></o:p></SPAN></P>
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