Mandatory SPF checks will be implemented on the servers starting tomorrow afternoon. This will hopefully combat the deluge of spam customers have been receiving lately.
If you are receiving Undelivered/Undeliverable messages, then make sure you visit the “SPF Wizard” within the control panel to add an SPF record for your domain. If you are using Apis to send e-mail — which should look configured as such — then the default settings should help limit the amount of backscatter you are currently receiving.
Failing that, there is one more idea with maildrop presets, but let’s see what happens.
12:49 PM EDT — SPF checks are now implemented on all of the servers. You should begin seeing a reduction in spam. Also, make sure the SPF record is a strict fail (-all) instead of a softfail (~all). You may edit the TXT record via DNS Manager if it is a softfail.
Pingback:Apis Networks Community Updates » MTA SPF Checks Removed