Single NAT, Web & Mail Server On The Inside: From The Inside

Change to:

pass in on $ext_if inet proto tcp to $ext_if port $webports rdr-to $webserver
pass in on $ext_if inet proto tcp to $ext_if port $email rdr-to $mailserver
pass in log on $int_if inet proto tcp from $int_if:network to $ext_if port $webports rdr-to $webserver
pass in log on $int_if inet proto tcp from $int_if:network to $ext_if port $email rdr-to $mailserver
match out log on $int_if proto tcp from $int_if:network to $webserver port $webports nat-to $int_if
pass on $int_if inet proto tcp to $webserver port $webports
match out log on $int_if proto tcp from $int_if:network to $mailserver port $email nat-to $int_if
pass on $int_if inet proto tcp to $mailserver port $email