Authorjosh

Yahoo Feedback Loop

If you are utilizing the Yahoo Complaint Feedback Loop, you should have received an email today about an upcoming change to the CFL. The message received was: “On June 29, 2015, we will transition Yahoo Complaint Feedback Loop (CFL) administration from Return Path to Yahoo Customer Care. We will continue sending spam reports during this transition. However, you will need to save existing...

Image Blocking

I received this email earlier this week, an email that I wanted but this is how it arrived. The email contained a single image link, a text line of who the message was sent to, the senders name, address, and finally an unsubscribe link. Good news, the email is CAN-SPAM compliant! Bad news, I have no idea what the content of the message is and it looks somewhat spammy.  The email was sent to my...

PTR Records

PTR records are easy to over look and they have a significant impact on your ability to deliver mail without them.  Some ISP and mailbox providers will reject mail from IP addresses that do not have a PTR record created. PTR records are a type of DNS record that resolves an IP address to a fully qualified domain name or FQDN.  The PTR records are also called Reverse DNS records. If you are...

Yahoo Mail Deliverability FAQ Updated

Yahoo has updated their FAQ and listed out a number of factors they use to determine if a mail message is spam. IP Address Reputation URL Reputation Domain Reputation Sender Reputation DomainKeys Identified Mail (DKIM) signatures DMARC authentication Autonomous System Number (ASN) reputation Autonomous System Number (ASN) is a globally unique number that is assigned to a group of IP networks...

DMARC=BestGuessPass

Looking at the headers within the mail received with my Office365 domain I see dmarc=bestguesspass.  BestGuessPass?  That’s a new. A few days after seeing dmarc=bestguesspass, Terry Zink at Microsoft posted an explanation. Exchange Online Protection, the filtering system for Office365, is analyzing the authentication of incoming emails and if the domain is not publishing a DMARC record, EOP...

What is the Mail From field?

When emails are sent, there are two from fields, the Mail From and the Display From address.  The Display From address (technically referred to as RFC.5322 from address) is the from address that is displayed to the end user within their email client.  The Mail From (technically referred to as RFC.5321 from address) is the email address to which bounce messages are delivered.  The Mail From field...

Office365/EOP and Outlook.com/Hotmail will converge

Terry Zink posted two informative blog posts recently, the first being the change to unauthenticated mail sent over IPv6 to EOP and the second post about EOP (Office365 and Exchange Hosting) and Outlook.com/Hotmail infrastructure converging. Exchange Online Protection (EOP) is the filtering system in place for Office 365 and hosted Exchange customers. Outlook.com/Hotmail utilized its own mail...

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