NO Mailbox does not exist

jaybea28309 · 21 Aug 2023, 05:45 PM

I am not getting mail from my folders on my email clients this morning (mobile and PC, different clients) although I can see them if I log into the Fastmail webmail. The error message on the email clients is "NO Mailbox does not exist" It looks like this started at about 22:20 BST last night. Messages appear in the mail INBOX but not folders below that level. It looks like an IMAP issue?

n5bb · 22 Aug 2023, 03:35 AM

I suggest logging into your Fastmail account with a browser and examining the App Passwords setup in Settings>Privacy & Security>Integrations tab. The error message seems to indicate that your email clients can’t access your Fastmail mailbox for some reason, and some problem with your App Password might be involved. But as you say, it does appear to be an IMAP issue with folders, which is strange.

If that doesn’t help, I suggest filing a Fastmail support request. I have seen no such problems with my Fastmail accounts.

Bill

akorvemaker · 29 Aug 2023, 05:44 AM

Around the same date, though I don't recall exactly when (possibly closer to the 23rd or 24th?), the mail client (Aqua Mail) on my Android phone suddenly stopped showing any folders after years of working flawlessly.

It still worked fine on the web, and in Thunderbird on PC, and when I tried a different mail client.

I ended up just wiping the account from Aqua Mail, setting a new app password, and setting it all up again. It seems to be working fine for me now.

It might be coincidence, but it might be something that changed at FM and only affected a few people. Or aliens. I suspect aliens.

Andy

jaybea28309 · 7 Sep 2023, 06:11 PM

As an update to this, Fastmail confirmed that this was due to a reconfiguration change at their end. I had a similar issue to @akorvemaker on one account in Aquamail and also solved it by wiping the account. The change seems to have involved changing the folder hierarchy, so folders that were sub-folders of Inbox moved to the same level as the Inbox, which then broke a few things. In general, rediscovering the folders in my email clients resolved the problem.

I have since moved the folders back to be sub-folders of Inbox, but this has broken all the custom Seive filters and they way that folders are referenced in Seive seems to have changed so I am now trying to work out how to get mail into the folders again.

JeremyNicoll · 7 Sep 2023, 08:56 PM

Quote:

Originally Posted by jaybea28309

I have since moved the folders back to be sub-folders of Inbox, but this has broken all the custom Seive filters and they way that folders are referenced in Seive seems to have changed so I am now trying to work out how to get mail into the folders again.

That certainly warrants a complaint to FM.

Previously their webmail system has always coped when folders changed name, or position in the hierarchy. It's terrible news that they may have broken that feature.

21 Aug 2023, 05:45 PM	#1
jaybea28309 Junior Member Join Date: Jul 2009 Posts: 19	NO Mailbox does not exist I am not getting mail from my folders on my email clients this morning (mobile and PC, different clients) although I can see them if I log into the Fastmail webmail. The error message on the email clients is "NO Mailbox does not exist" It looks like this started at about 22:20 BST last night. Messages appear in the mail INBOX but not folders below that level. It looks like an IMAP issue?

22 Aug 2023, 03:35 AM	#2
n5bb Intergalactic Postmaster Join Date: May 2004 Location: Irving, Texas Posts: 8,929	I suggest logging into your Fastmail account with a browser and examining the App Passwords setup in Settings>Privacy & Security>Integrations tab. The error message seems to indicate that your email clients can’t access your Fastmail mailbox for some reason, and some problem with your App Password might be involved. But as you say, it does appear to be an IMAP issue with folders, which is strange. If that doesn’t help, I suggest filing a Fastmail support request. I have seen no such problems with my Fastmail accounts. Bill

29 Aug 2023, 05:44 AM	#3
akorvemaker Master of the @ Join Date: Nov 2002 Location: Canada Posts: 1,015	Around the same date, though I don't recall exactly when (possibly closer to the 23rd or 24th?), the mail client (Aqua Mail) on my Android phone suddenly stopped showing any folders after years of working flawlessly. It still worked fine on the web, and in Thunderbird on PC, and when I tried a different mail client. I ended up just wiping the account from Aqua Mail, setting a new app password, and setting it all up again. It seems to be working fine for me now. It might be coincidence, but it might be something that changed at FM and only affected a few people. Or aliens. I suspect aliens. Andy

7 Sep 2023, 06:11 PM	#4
jaybea28309 Junior Member Join Date: Jul 2009 Posts: 19	As an update to this, Fastmail confirmed that this was due to a reconfiguration change at their end. I had a similar issue to @akorvemaker on one account in Aquamail and also solved it by wiping the account. The change seems to have involved changing the folder hierarchy, so folders that were sub-folders of Inbox moved to the same level as the Inbox, which then broke a few things. In general, rediscovering the folders in my email clients resolved the problem. I have since moved the folders back to be sub-folders of Inbox, but this has broken all the custom Seive filters and they way that folders are referenced in Seive seems to have changed so I am now trying to work out how to get mail into the folders again.