Yahoo FBL confirmation problems

yahoo_en-US_f_p_142x37Over the last few months I’ve seen people complaining about losing the Yahoo FBL emails with verification codes. This seems to be intermittent and no one could really explain what was going on.
Dale Lopez, VP of operations for V12 group, shared that their operations group discovered that one issue with the missing verification emails has to do with the length of the From: address and a port25 default settings.
In Dale’s words:

We figured it out and have confirmed via test. . .  If you are a PowerMTA user (Port25 Solutions), the default from line that PMTA accepts is set to 64. The from line that Yahoo has in the verification code message, is much longer. If you increase the length of the maximum characters to 254, you should receive the verification email.

So if you’re having problems receiving the Yahoo verification emails, check with your IT department to make sure you’re not restricting the path length. The “path” in this case is the return-path address. RFC 5321 says “the maximum total length of a reverse-path or forward-path is 256 octets (including the punctuation and element separators).” Reverse-Path in this case is the address in the envelope from, Forward-Path is the address in the To: line.
So if you’re one of the companies having problems receiving the Y! verification email, check you incoming mail settings and make sure you’re not blocking long email addresses.
 

Related Posts

Yahoo FBL problems

Multiple ESPs are reporting that the volume of Yahoo! FBL reports have slowed to a trickle over the last 24 or so hours. While we don’t know exactly what is going on yet, or if it’s on track for being fixed, there does seem to be a problem.
There has been some ongoing maintenance issues with the Yahoo! FBL, where requests for updates and changes weren’t being handled in a timely fashion. Informed speculation was the resources needed to fix the FBL modification weren’t available. The interesting question is if Y! will commit the resources to fix the FBL. I could make arguments either way. But Yahoo! gets the benefit of the this-is-spam button whether or not they send a complaint back to the sender.
5/21 5pm: Both Yahoo and Return Path (who administer the Y! FBL) are aware of the problem and are working on it.
5/21 6:30pm: Reports are flowing again according to multiple sources.

Read More

FBL updates

Roadrunner shifted the release date for their new FBL to December 14th.
Despite rumors, the Yahoo FBL is not actually accepting new participants.

Read More

Yahoo Feedback Loop

yahoo
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 CFL information as it will not be available after the transition.
To save the existing CFL information:

Read More