Occasionally a user forwards me an email that looks 'fishy'. This email usually consists of a word doc that asks the user to click 'enable editing' or some bs like that. Obviously I just blacklist the domain right?
Well in some of these cases the orgs that are sending these spurious emails are potential customers for us, like state wide, country wide, international service providers, they just have something wrong in their dns records or email sever setup. So I just don't want to BL them.
Today I went to one of these websites and clicked on Contact Us, sent an email explaining what was wrong with their setup.
In this case their spf record is missing a space between the last server address and -all, effectively making their spf record do nothing, even though mxtoolbox doesn't show invalid syntax errors or anything.
Ive done this a few times over the years.
Do any of you do similar things?