EMAIL SENT TO SUPPORT . . . . .
Support,
QB uses sendgrid.com for their invoice (and probably other) outbound email sends. So the actual send comes from three IP addresses belonging to sendgrid.com, 167.89.82.160, 167.89.58.229 and 167.89.58.138.
All three of those IP addresses are listed in spamcop.com’s blacklist. This blacklist is used by various email servers to decide if an email will be delivered or blocked.
Consequently, when an invoice is sent to an email address whose server uses spamcop.com for blacklist testing, the email is blocked. Conversely, when the email server uses a different spam checking source (or none) the email is delivered.
Neither Technology At Work or QB controls how the destination server check for spam. And the end user has no control as well.
The only solution is to delist the three IP addresses from spamcop’s list, or move to new, clean IP addresses.
Delisting can only be initiated by sendgrid, it is their system that actually sends the email. Or they can change IP addresses (but that may create another set of problems with email reputation).
No amount of changing emails in QB will fix the problem.
To confirm this, go to spamcop.com and check the three IP addresses.
Then contact sendgrid.com (who you pay every month) and have them fix this. You might also remind them there are ways to routinely and automatically check for blacklisting and they (and QB) should really do that to avoid this in the future.
I can be reached at ###-###-#### and ###@##########.com
Thanks,
