Yahoo having problems

Yahoo seems to be having some massive system issues the last 24 hours or so. DNS has been down, mail was down. I’m seeing reports things are coming back now, but there’s a lot of backed up mail traffic and the congestion may take a few hours to resolve.

If you have the ability to do traffic shaping on the sending end, now would be a good time to be extra conservative in your sending to Yahoo. After 7 hours, there’s a lot of volume that will be trying to hit their servers all at once. Ratcheting down connections to single digits will free up resources for the other emailers that are trying to get in. Globally, backups are likely to clear faster if folks send slower for the first couple hours.

According to CNN the problem started in Europe. There’s probably a Brexit joke in here somewhere…. but I don’t think I can compete with the real pundits.

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Email news today

Ironport have rolled out an update to their rule engine which has a bug causing mail problems. According to discussion on the mailop list, the new rule engine is folding the header with a line feed (LF) rather than a carriage return (CRLF). This is breaking things, including DKIM signatures. Ironport is aware of the issue. I expect an updated rollout shortly.

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OATH and Microsoft updates

I’ve seen multiple people asking questions about what’s going to happen with the Yahoo and AOL FBLs after the transition to the new Oath infrastructure. The most current information we have says that the AOL FBL (IP based) is going away. This FBL is handled by the AOL infrastructure. As AOL users are moved to the new infrastructure any complaints based on their actions will come through the Yahoo complaint feedback loop (CFL). The Yahoo CFL is domain based. Anyone who has not signed up for the Yahoo CFL should do so.
When registering you will need each domain and the selectors you’re planning on using. Yahoo will send an email with a confirmation link that needs to be clicked on within a short period of time in order to activate the FBL.
Microsoft’s SNDS program had an outage at the end of last week. That’s been fixed, but the missing data will not be back populated into the system. This has happened a couple times in the past. It seems the system gets a live feed of data. If, for some reason, the data is interrupted, then it’s gone and doesn’t get populated.

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More on AOL transition to Oath Infrastructure

AOL posted on their blog today about changes to DMARC reporting and FBL messages as they continue to transition domains to the OATH infrastructure. As AOL domains go to the new infrastructure, DMARC reports for those domains will be included in the existing Yahoo DMARC reports.
After the MX migration is done, they’ll start migrating the actual user mailboxes. Right now, FBL messages for AOL properties are coming from AOL and will continue to do so until the actual mailbox is transitioned to the new infrastructure. Once the mailbox is transitioned, then any FBL emails from that address will come from the Yahoo infrastructure. The blog post at AOL suggests signing up for both AOL and Yahoo FBLs during this transition phase.
It does bring up an interesting question as to whether or not the combined FBL is going to be IP based, DKIM based or a mix of both. It sounds like at least during some part of the consolidation there will be a DKIM only FBL. It could be that there will be some expansion to an IP system in the future. Or, it could be that all FBLs from AOL addresses will be based on DKIM domain.

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