Freaky message on blacklist DNS from G.

Any idea?

[hulahoop]

Hi,

I have just recently encoutered a funny prob with customer sending email to my email address domain.

Eg. Sender sends to me at [e-mail] from their GMAIL account. Gmail sends them a note saying ...

Technical details of permanent failure:
PERM_FAILURE: SMTP Error (state 9): 554 The IP Address of the sender
(64.233.166.179) was found in a DNS blacklist database and was therefore
refused.

Any idea what is wrong as the domain is a gmail domain and not mine and my customer is sending to me and not me sending to them. But when I try with my gmail I get that too but not when I try to send to my other personal email accounts.

I don't do any email marketing but it could be that my email sent out when my customers purchase or signs up.

[LifeinAsia]

Sounds like your mail server is configured to use blacklists to filter SPAM. Somehow, the IP address for that GMail server got added to the blacklist.