exiwhat commands shows what exim mail server is doing.
[root@server78 ~]# exiwhat 6415 delivering 1emCxq-0001f7-61: waiting for a remote delivery subprocess to finish 6428 delivering 1emCxq-0001f7-61 to aspmx3.googlemail.com [209.85.202.26] (billing@hostonnet.com) 6437 delivering 1emCxq-0001fd-TA: waiting for a remote delivery subprocess to finish 6452 delivering 1emCxq-0001fd-TA to aspmx3.googlemail.com [209.85.202.26] (billing@hostonnet.com) 8185 delivering 1emCyw-00021q-MM: waiting for a remote delivery subprocess to finish 8258 delivering 1emCyw-00021q-MM to alt3.gmail-smtp-in.l.google.com [108.177.15.27] (wllimosine@gmail.com) 9037 delivering 1emCzn-0002LS-NT: waiting for a remote delivery subprocess to finish 9041 delivering 1emCzn-0002LS-NT to aspmx5.googlemail.com [173.194.79.26] (billing@hostonnet.com) 11772 delivering 1emD1k-00033V-JM: waiting for a remote delivery subprocess to finish 11787 delivering 1emD1k-00033V-JM to alt2.aspmx.l.google.com [209.85.203.26] (billing@hostonnet.com) 11825 delivering 1emCOM-0004kF-WE: waiting for a remote delivery subprocess to finish 11829 delivering 1emCOM-0004kF-WE to alt2.gmail-smtp-in.l.google.com [209.85.202.26] (nitsaholidays@gmail.com) 11967 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51246 12631 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51247 12800 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51248 13564 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51249 13667 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51250 14009 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51251 14326 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51252 14446 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51253 14463 delivering 1emD3X-0003lD-2o: waiting for a remote delivery subprocess to finish 14469 delivering 1emD3X-0003lD-2o to aspmx.l.google.com [74.125.29.26] (billing@hostonnet.com) 14672 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51254 16096 handling TLS incoming connection from mail-ua0-f187.google.com [209.85.217.187]:39394 16175 handling TLS incoming connection from (telkomsa.net) [185.62.188.116]:51255 16556 tidying up after delivering 1emD4s-000371-T9 16559 accepting a local non-SMTP message from <> 16622 tidying up after delivering 1emD4u-0003oe-EZ 16626 accepting a local non-SMTP message from <> 16663 tidying up after delivering 1emD4v-0003Hj-Ca 16666 accepting a local non-SMTP message from <> 16680 handling incoming connection from [74.208.175.54]:52747 16704 tidying up after delivering 1emD4x-0003YR-On 16707 accepting a local non-SMTP message from <> 16709 tidying up after delivering 1emD4y-0003l0-8X 16714 accepting a local non-SMTP message from <> 16744 tidying up after delivering 1emD4z-0003dx-AV 16749 accepting a local non-SMTP message from <> 16760 tidying up after delivering 1emD4z-0003KS-Kk 16764 accepting a local non-SMTP message from <> 16776 tidying up after delivering 1emD50-000371-Ge 16782 accepting a local non-SMTP message from <> 16802 tidying up after delivering 1emD54-0003Wm-Sr 16805 accepting a local non-SMTP message from <> 16816 tidying up after delivering 1emD55-0003oe-8h 16824 accepting a local non-SMTP message from <> 16830 tidying up after delivering 1emD56-0004Ct-0r 16833 accepting a local non-SMTP message from <> 16842 handling incoming connection from [212.237.45.48]:50484 16845 handling incoming connection from [212.237.45.48]:58446 16854 delivering 1emD5F-0004Nf-6l: waiting for a remote delivery subprocess to finish 16855 tidying up after delivering 1emD57-0003Hj-Hq 16860 accepting a local non-SMTP message from <> 16864 delivering 1emD5F-0004Nf-6l to aspmx.l.google.com [74.125.192.27] (billing@hostonnet.com) 16870 tidying up after delivering 1emD4y-0004IX-Sd 16871 tidying up after delivering 1emD57-0003j4-Sf 16876 accepting a local non-SMTP message from <> 16890 handling incoming connection from [185.156.173.137]:58672 23465 running queue: waiting for 1emCOM-0004kF-WE (11825) 24554 daemon(4.89_1): -q1h, listening for SMTP on port 25 (IPv6 and IPv4) port 587 (IPv6 and IPv4) and for SMTPS on port 465 (IPv6 and IPv4) [root@server78 ~]#