don't fail on existing directories

regenerate-mail-cert.sh

@@ -29,7 +29,7 @@ openssl req -new -x509 -extensions v3_ca -keyout "$ca_key_file" -out "$ca_cert_f
 
 chmod 0600 "$key_file" "$key_nopass_file" "$ca_key_file"
 
-mkdir "$postfix_dir"
+mkdir -p "$postfix_dir"
 chmod 0700 "$postfix_dir"
 
 cp "$key_nopass_file" "$cert_file" "$ca_cert_file" "$postfix_dir"
@@ -55,7 +55,7 @@ rc-service postfix restart
 
 #dovecot config
 
-mkdir "$dovecot_dir"
+mkdir -p "$dovecot_dir"
 
 cp "$key_nopass_file" "${dovecot_dir}/$key_nopass_file"
 cp "$cert_file" "${dovecot_dir}/$cert_file"