Emails not delivering to MXRoute (PTR Error)

[eboppel]

Continuing the discussion from Mails from Offie 365 are not delivering to Mxroute:

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Hello Jarland, new customer here and complete newbie!

I just migrated a customer (uniforcele.com) to MXRoute. He just reported that one of his supplier’s emails (greatwhitefleet.com) are getting rejected by MXRoute.

This is the message his supplier sent to him:

Not sure what this means, but from what I understand apparently there is an error on greatwhitefleet.com’s emails regarding PTR and they are being rejected due to a security check?

How can I fix this on my end?

Thank you
Eduardo

[Jarland]

Sorry for the trouble. The layer that rejected this email is something I really don’t want catching false positives, it’s not very clear in it’s reasoning but offers a good method of skimming the worst emails off the top. I clearly need to tweak it a bit more.

I believe this has been successfully whitelisted and should not happen again.

[eboppel]

Thank you for the quick fix Jarland! I’ll report back if any other emails get rejected.