people emailing us getting undeliverable

[john_fugazi]

i have this happen twice and the only way i know about it is because i am on the phone with them.

a person sends an email and they receive a undeliverable. i watch the event logs and nothing ever shows up. if i send that person a test email, then he can send me emails.

is there a setting i can change to let emails come through and then get filtered?

[dwasserman]

You need to view the Non Delivery Report received by your contact.

[hlarsen]

check your port forwards and mx records.
if you send them a test email from where? to where? the mail server is behind the Untangle?