diff --git a/src/storage/zone.cr b/src/storage/zone.cr
index 2d44866..fe9e0b1 100644
--- a/src/storage/zone.cr
+++ b/src/storage/zone.cr
@@ -260,6 +260,22 @@ class DNSManager::Storage::Zone
 	# baguette.netlib.re. 3600 IN TXT "v=spf1 a mx ip4:<IP> a:mail.baguette.netlib.re ~all"
 	class SPF < ResourceRecord
 
+		def qualifier_to_char(qualifier : Qualifier) : Char
+			case qualifier
+			when .pass?
+				'+'
+			when .none?
+				'?'
+			when .soft_fail?
+				'~'
+			# when .hard_fail?
+			else '-'
+			end
+		end
+		def qualifier_to_string(qualifier : Qualifier) : String
+			"#{qualifier_to_char qualifier}all"
+		end
+
 		# SPF mechanisms are about policy, which comes with the form of a single character:
 		# - '?' means no policy (neutral),
 		# - '+' means PASS result. Default behavior for any mechanism except `all`.
@@ -309,6 +325,10 @@ class DNSManager::Storage::Zone
 				errors = [] of Error
 				errors
 			end
+
+			def to_s
+				"#{@t}=#{v}"
+			end
 		end
 
 		class Mechanism
@@ -333,7 +353,7 @@ class DNSManager::Storage::Zone
 			# TODO
 			def get_errors : Array(Error)
 				errors = [] of Error
-				case @q
+				case @t
 				when Mechanism::Type::A
 				when Mechanism::Type::IP4
 				when Mechanism::Type::IP6
@@ -344,6 +364,10 @@ class DNSManager::Storage::Zone
 				end
 				errors
 			end
+
+			def to_s
+				"#{qualifier_to_char @q}#{@t}=#{v}"
+			end
 		end
 
 		property v : String = "spf1"
@@ -363,11 +387,11 @@ class DNSManager::Storage::Zone
 			errors = [] of Error
 
 			unless Zone.is_subdomain_valid? @name
-				errors << "CNAME invalid subdomain: #{@name}"
+				errors << "SPF invalid subdomain: #{@name}"
 			end
 
 			if @ttl < Zone.ttl_limit_min
-				errors << "CNAME invalid ttl: #{@ttl}, shouldn't be less than #{Zone.ttl_limit_min}"
+				errors << "SPF invalid ttl: #{@ttl}, shouldn't be less than #{Zone.ttl_limit_min}"
 			end
 
 			@mechanisms.each do |m|
@@ -388,11 +412,40 @@ class DNSManager::Storage::Zone
 		end
 
 		def to_s(io : IO)
-			io << "TODO"
+			io << "(#{ "%4d" % @rrid }) "
+			io << "#{ "%30s" % @name} #{ "%6d" % @ttl} IN SPF "
+			io << '"'
+			@mechanisms.each do |m|
+				io << m
+				io << ' '
+			end
+			if mod = @modifiers
+				mod.each do |m|
+					io << m
+					io << ' '
+				end
+			end
+			io << qualifier_to_string @q
+			io << '"'
+			io << "\n"
 		end
 
 		def to_bind9(io : IO)
-			io << "TODO"
+			io << "#{@name} #{@ttl} IN TXT "
+			io << '"'
+			@mechanisms.each do |m|
+				io << m
+				io << ' '
+			end
+			if mod = @modifiers
+				mod.each do |m|
+					io << m
+					io << ' '
+				end
+			end
+			io << qualifier_to_string @q
+			io << '"'
+			io << "\n"
 		end
 	end