Odd email issues

Hi I’ve been seeing some strange messages in my qmail send log and I was hoping I could get some input on it. Let me start off saying one of my customers complained that a few of their clients were having a problem sending them email… server response was as follows:

Connected to [my.ip.add.rss] but connection died. (#4.4.2)
I’m not going to try again; this message has been in the queue too long.

After doing some digging, I found several messages in the remote queue all some of which originated from this customer. Here is the log entry for one of those messages.

@4000000049bfb7cd374e12cc delivery 56: deferral:<name@foo.com>:_Sender_address_rejected:_unverified_address:_conversation_with_mail.foo.com[my.ip.add.rss]_timed_out_while_receiving_the_initial_server_greeting/Giving_up_on_205.234.223.160./

I also noticed today that Yahoo mail is having problems receiving my emails.

Bounce message: failed after I sent the message.
Remote host said: 451 Message temporarily deferred - [270]
I’m not going to try again; this message has been in the queue too long.

log entry:
@4000000049bfbfd71b84e23c delivery 174: deferral: Connected_to_66.196.82.7_but_greeting_failed./Remote_host_said:421_Message_from( my.ip.add.rss)temporarily_deferred-_4.16.50._Please_refer_to_http://help.yahoo.com/help/us/mail/defer/defer-06.html/

I?ve noticed craigslist will not receive emails from my server as a result of my rDNS.

My rDNS is MY-IP-ADD-RSS.static.sagonet.net
Do these issues all have to do with the rDNS settings from my server host?

Thanks in advance

I’m not sure if this helps. I was recently having the same problem with Yahoo. I was also having problems sending to AT&T/SBCGlobal accounts. AT&T had blocked my server for some reason. I had to get the Received-SPF header in outgoing emails to “pass”. It was at “neutral” when I was having problems. Since I’ve changed some things and got it to “pass” mail has been flowing smoothly:

Received-SPF: pass (google.com: domain of root@mx1.mydomain.net designates my.ip.ad.dr as permitted sender) client-ip=my.ip.ad.dr;

rDNS could also create an issue. Some mail servers get a bit strict as to who can connect to deliver mail. The rDNS for your mail server IP should match your mail server hostname.

I’m not sure about the sender_address_rejected issue. Could they be trying to send a file that is too big? The default is 20MB. The setting is in /var/qmail/control/databytes.

EDITED TO ADD: Wow cool. Your message was posted today at exactly 11AM and mine today at exactly 11PM. :slight_smile:

Well, I figured out why my customers are not receiving some of the emails from their clients. It appears the bl.spamcop.net has become a little too aggressive as of late. I removed the list from my rbls and emails started pouring in.

Anyone else using the spamcop.net blacklist?

I think it’s a default for InterWorx?

I guess I should rephrase my question then…

Has anyone else had problems with their customers not receiving email because of the spamcop.net rbl?

The question was right, I guess my answer would be no. I was just point out that I think this would be a more known issue by now since I believe (not 100%) that InterWorx has spamcop on by default.