cPanel

jetemail_login: 
driver = plaintext 
public_name = LOGIN 
client_send = : YOURUSERNAME : YOURPASSWORD

remoteserver_route: 
driver = manualroute
.ifdef SRSENABLED
# if outbound, and forwarding has been done, use an alternate transport
transport = ${if eq {$local_part@$domain} \
{$original_local_part@$original_domain} \
{jetemail_smtp} {jetemail_forward_smtp}}
.else
transport = jetemail_smtp
.endif
domains = !+local_domains 
ignore_target_hosts = 127.0.0.0/8 
route_list = * relay.jetsmtp.net::25 randomize byname 
host_find_failed = defer 
no_more

jetemail_smtp:
driver = smtp
hosts_require_auth = *
tls_tempfail_tryclear = true
headers_add = X-AuthUser: ${if match {$authenticated_id}{.*@.*}\
{$authenticated_id} {${if match {$authenticated_id}{.+}\
{$authenticated_id@$primary_hostname}{$authenticated_id}}}}
dkim_domain = ${perl{get_dkim_domain}}
dkim_selector = default
dkim_canon = relaxed
dkim_private_key = "/var/cpanel/domain_keys/private/${dkim_domain}"


jetemail_forward_smtp:
driver = smtp
hosts_require_auth = *
tls_tempfail_tryclear = true
headers_add = X-AuthUser: ${if match {$authenticated_id}{.*@.*}\
{$authenticated_id} {${if match {$authenticated_id}{.+}\
{$authenticated_id@$primary_hostname}{$authenticated_id}}}}
dkim_domain = ${perl{get_dkim_domain}}
dkim_selector = default
dkim_canon = relaxed
dkim_private_key = "/var/cpanel/domain_keys/private/${dkim_domain}"
.ifdef SRSENABLED
return_path = ${srs_encode {SRS_SECRET} {$return_path} {$original_domain}}
.endif
max_rcpt = 1

* data_4xx F,4h,1m
* rcpt_4xx F,4h,1m
* timeout F,4h,1m
* refused F,1h,5m
* lost_connection F,1h,1m
* * F,6h,5m

+secondarymx * F,4h,5m; G,16h,1h,1.5; F,4d,8h
* * F,2h,15m; G,16h,1h,1.5; F,4d,8h
* auth_failed