First of all, please make sure that the spam filter really is to blame, as other issues might cause the problem.
Please see the related topic "
Undelivered Mail Errors: Why wasn’t my e-mail delivered?” for more information.
In order for the automatic e-mails to be delivered and pass the spam filter,
please ask your organization’s postmaster to whitelist our domains and/or IP addresses:
conftool.net - 116.202.134.118 (was: 88.99.71.145)
conftool.com - 116.202.134.119 (was: 144.76.152.56)
conftool.pro - 116.202.134.123 (was: 136.243.24.47)
conftool.org - 168.119.69.19
conftool.de - 162.55.26.142 (was: 144.76.156.74, 23.88.73.227)
Safety is our main concern and therefore we would like to point out that we exclusively use the IP address listed here and that we never send any unsolicited mails.