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Assuming that you have set up SPF, DKIM, rDNS and that you are not blacklisted, your only options is Microsoft Smart Network Data Services. No kidding. That is official MS's program for registering responsible person (administrator) for IP address on which mail server runs. That way you can observe and review status of IP address of your mail server. MS ...


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Doing an ARIN lookup of your IP, it looks like it's coming from a provider that offers cloud hosting services. It seems pretty standard for Cloud hosting providers to get blacklisted simply because of how often IP addresses can change hands and how easy it is for instances to send Spam. Mail services end up black listing the entire hosting provider's block....


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The headers you posted don't really look like Hotmail Headers. Can you log into hotmail online not through thunderbird and grab the headers from the actual email. They normally contain all the codes to tell you why it's going to spam. I did check your IP at Symantec and it was clean (sometimes that's the culprit for Hotmail issues). You also might have a ...


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The currently relevant RFC, RFC 5322, states how an email should be formatted. It does not specify how any email program (whether server or client) should handle emails which are not properly formatted. Thus, it is up to whoever writes the software to make that decision. In other words, there is no general answer to your question. Some programs may give an ...


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By default, permit_mynetworks is set under smtpd_recipient_restrictions . mynetworks is set to 127.0.0.0/8 and its IPv6 equivalent. This allows unauthenticated mail from localhost. There is likely a rogue process that's just sending mail to localhost. If you remove that option, at least the mails may stop. But you'll still need to find the rogue process. You ...


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99% of the time, email is delivered via the MX record mechanism. The MX record designates which server is authoritatively responsible for accepting email for a given domain. But that doesn't mean that this server is also the server where the recipients mailbox is. The MX record only designates which server to deliver the email to, it doesn't designate which ...


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This statement is not accurate: " Email delivery is done by Sender's Mail Server sending E-Mail directly to Receiptent's Domain Mail-Server" For example, at my firm, when I send an email from my mail client, I might not have an externally-facing SMTP server at my site. Mail might be routed within my company's Exchange infrastructure. Then, it might ...


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you can use some network sniffer tools which will pinpoint to process level which one is sending what. You can as well filter if needed. some examples: network monitor 3.4 (microsoft) outdated, but works well. fiddler ... (other most probably) Give network monitor a try and within 15 minutes you know where to look next.


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netstat -b -o lists the network connections, process and PID - you should be able to figure out which IIS worker process is doing all the port 25 connections.


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You can use the same key for multiple domains. Using different selectors for the same key won't help your reputation. It will also make signing more difficult. You can use the same selector for different keys as they will be published under different domains. You will need to publish the selector DNS record for each sending domain. Sign the outgoing ...


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You have mentioned that you created a DKIM and SPF record on Google Apps. After you moved to Zoho, you need to do the same thing. Here is a link to Zoho that will show you how and what SPF and DKIM records to add to your DNS. From my understanding, without an SPF and DKIM record, your emails are not verified. This means Yahoo! cannot verify that you are ...


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Based on the information provided and the fact that you do have a valid PTR record, the only thing you seem to be missing is experience. For most lists, having a neutral reputation does not mean much when the volume analyzed is too low to draw conclusions. Sending more and more clean messages to different domains will progressively improve your inbox ...


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From what I see it looks like Spamhouse has answered differently second time. I.e. first answer was "there is a spammer", but 8 minutes later answer was "there is nothing special". Why it was answered it is hard do say. If you have access do DNS server query logs which is set to resolve your mail server's dns queries, you might find some clues there. For ...


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If you like to block the IP of the sending client, than you will have to set up the RBLs in ... smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client zen.spamhaus.org, reject_rbl_client bl.spamcop.net, reject_rbl_client cbl.abuseat.org, permit ...


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Your configuration isn't optimal, better use RBLs in the client restrictions. Here's what I would suggest, though some is a bit restrictive and I don't know your complete setup of Postfix. This is an example, see Postfix manual and advices for more information about the params … smtpd_helo_restrictions = permit_mynetworks, permit_sasl_authenticated,...


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Since many years postgrey is a very good solution for me in the fight against spam/malware. It reduces the traffic load in SA/ClamAV up to 90% with almost no false positives. A good similar solution is policyd/cluebringer with a frontend for an easy configuration handling via web browser. With cbpolicyd you can also handle a throttle for outgoing mails in ...


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This address is part of a network served by a provider in Poland: http://www.tcpiputils.com/browse/ip-address/155.133.82.96 I have also often scans against my MTA coming from that network, mostly/only for SASL login break attempts. What I recommend to keep that stuff away: A solution with Postfix only is not possible as far as I know. But you could use i. ...


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You can prevent such problems by setting up Transport Layer Security for Outbound Mail. If you do that, you will also have to enable TLS on the clients sending (like Outlook).



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