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this plugin stopped working maybe after new cert was installed, not 100% sure. when I run a test email I just get a blank screen no diagnostics shown.
I have another plugin wp mail log, when I look at that shows an error “SMTP Error: Could not connect to SMTP host.” but when running iptraf-ng I can see the following
from apache:40950 to exchange:smtp first packet (SYN)
from exchange:smtp to apache:40950 first packet (SYN)
from exchange:smtp to apache:40950 FIN sent 7 packets, 729 bytes, avg flow rate 1.16 kbps
from apache:40950 to exchange:smtp FIN acknowleged
from apache:40950 to exchange:smtp FIN sent 8 packets, 466 bytes, avg flow rate 0.74 kbps
from exchange:smtp to apache:40950 FIN acknowleged
so I know some sort of connection is happening, I have another plugin postie that works just fine, but uses pops protocol not smtp
wordpress is on a fedora 24 server.
exchange is 2010
any thought will be much appreciated