minor fix and improvement

content/server/smtpd-email.md

@@ -55,6 +55,8 @@ SPF records are designed to prevent forgery. They allow you to specify rules abo
 zacoons.com:   v=spf a -all
 ```
 
+This will check that the sender's IP address matches an A record for zacoons.com.
+
 Read about SPF [here](http://www.open-spf.org/SPF_Record_Syntax) and check out what others do by running `dig +short TXT <domain>` (e.g. `dig +short TXT gmail.com`)
 
 ### DMARC (Domain-based Message Authentication, Reporting, and Conformance)
@@ -74,7 +76,7 @@ Read about DMARC [here](https://dmarc.org/overview) and check out what others do
 ### Configuring OpenSMTPD
 
 ```
-# /etc/smtpd.conf
+# /etc/mail/smtpd.conf
 
 pki example.com cert "/etc/ssl/example.com.fullchain.pem"
 pki example.com key "/etc/ssl/private/example.com.key"