EDIT: I later found
this, saying: changing port to 587 got it working.
This -might- be relevant (but I'm very UNsure)
Code:
But when I let mxtoolbox check the SMTP configuration, it came back with:
SMTP Transaction Time 15.427 seconds - Not good! on Transaction Time
SendSMTPCommand: Timeout waiting for response after 15 seconds.
...
I tried logging in with telnet port 25
Between "connected to" and "220" was almost 20 seconds.
I found out that the setting " Introduce a delay into the SMTP transaction
for unknown hosts and messages detected as spam. "
in the Exim Basic editor ACL options was de culprit.
When I disabled that option, mxtoolbox reported:
SMTP Connection Time 0.855 seconds - Good on Connection time
...
customize that value in your Exim configuration file. Here are the sections to modify:
I -wonder- if this might be some 'security' setup on the destination...[?]
