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It is used to '''convert IP-addresses to host names'''. | It is used to '''convert IP-addresses to host names'''. | ||
| − | For example, the A record for myidealhost.com resolves this domain name to 178.63.79.205 | + | For example, the A record for ''myidealhost.com'' resolves this domain name to 178.63.79.205 |
| − | And then the PTR record resolves 178.63.79.205 back to myidealhost.com: | + | And then the PTR record resolves 178.63.79.205 back to ''myidealhost.com'': |
<center>'''NS Record'''</center> | <center>'''NS Record'''</center> | ||
| − | (short for Name server). NS records '''allow you to identify the authoritative servers for this zone'''. Each domain must have NS records as without them, the servers for a domain would be unknown. | + | (short for Name server). NS records '''allow you to identify the authoritative servers for this zone'''. '''Each domain must have NS records''' as without them, the servers for a domain would be unknown. |
<center>'''SOA Record'''</center> | <center>'''SOA Record'''</center> | ||
| − | The first entry in each of the zone files is the Start of Authority (SOA) resource record. The SOA record '''indicates the name server for this domain'''. As the SOA record marks the beginning of a zone, there can be only one for each zone. | + | The first entry in each of the zone files is the ''Start of Authority (SOA)'' resource record. The SOA record '''indicates the name server for this domain'''. As the SOA record marks the beginning of a zone, there can be only one for each zone. |
The SOA record stores the following information: | The SOA record stores the following information: | ||
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<center>'''SPF Record'''</center> | <center>'''SPF Record'''</center> | ||
| − | Sender Policy Framework (SPF) record '''allows''' the domain owners '''to specify the hosts which are permitted to send email on behalf of their domains'''. Normal SMTP allows any computer to send an email claiming to be from anyone. This can be used by spammers to send emails with forged From: addresses. SPF allows a domain owner to specify which machines or hosts are authorized to transmit email for their domain. | + | Sender Policy Framework (SPF) record '''allows''' the domain owners '''to specify the hosts which are permitted to send email on behalf of their domains'''. Normal SMTP allows any computer to send an email claiming to be from anyone. '''This can be used by spammers to send emails with forged From: addresses'''. SPF allows a domain owner to '''specify which machines or hosts are authorized to transmit email for their domain'''. |
| − | For example, you can designate which hosts are authorized to send email originating from user@your-domain.com. Your recipient's servers will then check the SPF record to identify the origin of your message. | + | For example, you can designate which hosts are authorized to send email originating from ''user@your-domain.com''. Your recipient's servers will then check the SPF record to identify the origin of your message. |
'''Having SPF record set up will ensure that messages sent from users in your domain are not getting rejected by the recipient's domain'''.</div> | '''Having SPF record set up will ensure that messages sent from users in your domain are not getting rejected by the recipient's domain'''.</div> | ||
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