revamping the notify function (docker-mailserver#1836)

first (may-be) fixes for v9.0.0 startup problems (docker-mailserver#1835

)

* first (may-be) fixes for v9.0.0 startup problems
* adjust grep showing an error when it shouldn't

Merge pull request docker-mailserver#1782 from aendeavor/fix-#1781

removing bl.spamcop.net for 8.0.1

minor adjustments before release 8.0.0