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1answer
94 views

Postfix does not reject wrong client and HELO name

I have a postfix server configured with reject_unknown_client_hostname and reject_unknown_helo_hostname. Regardless the server accepts non sasl_authenticated connections from clients and HELO names ...
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votes
0answers
440 views

IP address is HELO'ing as “localhost.localdomain”

I've configured postfix SMTP server on Centos 6.4, But CBL blacklisted our IP for below reason This IP address is HELO'ing as "localhost.localdomain" which violates the relevant standards ...
0
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2answers
172 views

SMTP / HELO and RBL black listing

We've been having many issues with our external IP address being put on RBL's and blacklisted. We are using a 3rd party, hosted SMTP e-mail and we have two locations using it. Our TLD is ABC.com. ...
0
votes
2answers
851 views

SPF Failure sending sms message to sms.mycricket.com

I built an asp.net application that sends text messages to our employees using carrier-provided email to SMS gateways. The people on Cricket (sms.mycricket.com) are the only ones that are bouncing ...
2
votes
3answers
270 views

How to use multiple external names for outbound HELO in the EdgeSync outbound Send Connector?

I have an Exchange 2010 environment where there are multiple Edge servers; the FQDN of each server ("serverX.domain.local") is different from the name used in the corresponding public MX record ...
2
votes
2answers
4k views

CBL This IP address is HELO'ing as “localhost.localdomain”

I am pretty lost here, my server somehow got into a blacklist. And I don't know why and how to solve it. Please take a look at the link below. CBL List - click here Anyone knows what is going on ...
1
vote
3answers
2k views

Postfix Problem (helo/hostname mismatch)!

I have a server, and it is running a error for one email only (all other mails in that domain are working). How can i fix it? (The error is above:) May 17 11:43:56 webserver ...
1
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2answers
2k views

Postfix dynamic smtp_helo_name

I have a mail server that relays e-mails for two different domains. I want the smtp_helo_name to be different based on the domain. I'm assuming there is no way to do this via checking the mail ...