Rafael is reporting that Yahoo has finally fixed its broken IMAP implementation, which was the primary culprit in the Windows Phone data leak issue that was first uncovered in the comments section of this blog. Here are the details:
Back in January, I wrote about a Yahoo Mail issue that affected smartphones such as Windows Phone and the iPhone. To quickly summarize, whenever a smartphone checked for new Yahoo mail, the server would transmit more information than needed. While not a huge problem on desktops connected to broadband, it was huge in the mobile space – a space in which carriers snipe bandwidth hogs and users oblivious to their data usage and monthly allowances.
After discovered the problem, I made it habit to log into Yahoo every few days, checking their “imapgate” software version. Today, I was pleasantly surprised to see they had upgraded from 0.7.65_12.286037 to 0.7.65_14.298026 fixing the issue. I can’t say when this happened precisely, but I suspect it was rolled out earlier this week.
So good news, though I suppose just not using Yahoo would have solved the problem as well.

Yahoo’s IMAP implementation has been terrible for many, many years. It’s nice that it works on the phone but they should just go the easier route (like Google did) and license ActiveSync from MS.
You’re getting pretty nasty in your commentary recently, Paul, haha!
I’m worried you might snap and go postal one day though!
No worries there.
Fixed an IMAP issue huh?
At Least Yahoo HAS an IMAP implementation – I’ve been waiting for hotmail to give us IMAP forever!
I suppose we should be thankful – If the delay giving us IMAP and the delays in providing windows phone updates are anything to go by – Can you imagine how long it would it would take Microsoft to fix their IMAP issue?
u don’t need IMAP with hotmail on your phone, most phones have activesync now.
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Not so fast…
I just reconfigured by Samsung Focus to use Yahoo! IMAP on March 12. Within 24 hours of the switch, my WP7 used almost 500MB of data. I do not had definite proof that the swtich back to IMAP was the cause, since I wasn’t monitoring packets or anything, but I think that was the only thing changed on my phone. So be careful out there.
I’m switching back to using POP with Yahoo! – which at least for me doesn’t seem to consume as much data.