yahoo greylisting issue

Question asked by dean brown - 9/20/2017 at 5:57 AM

Unanswered

You have to add a filter for yahoo's email servers for greylisting as they don't resend the email from the same server each time and it will fail. The problem is that they have 1000's of email servers:

https://help.yahoo.com/kb/SLN23997.html

And it will take a long time to enter them all.(and they may change in the future)

How have other people solved this problem?

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Matthew Leyda Replied

9/20/2017 at 7:56 AM

Dean, I use a program from mightyblue.com called SMWhiteListFromSPF. It's a free program that pulls SPF records for the domains you want to bypass greylisting. I started using it years ago to fix ebay and have since added google, msn, yahoo and state lotto sites. I run it once a month and let it remove stale entry's and put the new entry's in the SM whitelist. Works on SM ver 15, no clue on Ver 16 since I'm not ready to update yet.

Kendra Support http://www.kendra.com support@kendra.com 425-397-7911 Junk Email filtered ISP

Brian Tesene Replied

9/20/2017 at 8:50 AM

Matthew, thank you for posting this. I had just realized I had an issue with Yahoo and Greylisting. What do you use for the entry for yahoo? I just tested it (on SM 16.x) with Hosts_To_Check=yahoo.com and it did not return any IPs or make any new entries in the whitelist file, however, when I add aol.com to the Hosts_To_Check setting, it returns IPs.

Matthew Leyda Replied

9/20/2017 at 1:28 PM

Brian,
It looks like the SPF record isn't valid. "v=spf1 redirect=_spf.mail.yahoo.com" I don't know what you can do in this case.

Kendra Support http://www.kendra.com support@kendra.com 425-397-7911 Junk Email filtered ISP

Brian Tesene Replied

9/20/2017 at 1:36 PM

Yep, that's what I thought. Well, it was worth a try. Thanks for introducing me to that tool though. It will still be useful with or without the ability to manage Yahoo.

dean brown Replied

9/20/2017 at 2:06 PM

Thanks Matthew - I'll try it out

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