I solved the problem!

In this case (to set Yandex Mail as an email account on other email clients) you must first setup a new password for Yandex Mail via Yandex's password app.

After you create a new password, you set it now as a new Yandex mail password. After that setting Yandex Mail as an email account in Vivaldi browser works like a charm.

Yandex changed this rule due to security concerns, since vast majority of users use simple passwords.

My solution is to use another browser. I have had this problem for too long.

I just gave up.

@yojimbo274064400 alt back arrow works but I can't find a menu with those save as filter and back options.. maybe mac is different

@mib2berlin @yojimbo274064400 I found the mail settings in the status bar. After clicking the rebuild database button I only had to wait for the rebuild, and now the search shows what I was looking for. Thank you.

@mib2berlin said in IMAP on Yahoo stopped working, probably with the 6.9 update:

@GistOfSpirit @giannilupindo
Hi, the Vivaldi developer work on a solution, as workaround use an app password created in your Yahoo account.
Simple password and OAuth are not working at moment.

It seems that last version 6.9.3447.41 (Stable channel) (64-bit) has fixed the issue about the app Yahoo! passwords (only an initial error after the configuration is still present). OAuth is still not working. Thanks.

Turns out to be an user error on my part. Apparently while creating the folders in the web client, I didnt add missing whitespace that was present in Vivaldi Mail. Thanks for all of your efforts.

Would be great tho if the error was more descriptive , eg. showing the affected folder name

@mib2berlin it works. Thanks!

@dalinar Please avoid using the "Reply as a topic" option unless you absolutely need to - creates less work for admins.

@sgunhouse I don't double-click. I "reply."

SOLVED in the sense that now I know there is no setting for this.

I upvoted the flag thing because that's better than nothing but I don't really see why a setting is necessary, why should sending blank subjects be allowed at all? I doubt there is anything useful these days that rely on a subject being blank

@Michael69 correct, Vivaldi only knows contacts from the emails you have sent and received. Contacts are so far basic at best. Vote for https://forum.vivaldi.net/topic/53314/contacts-carddav-sync by liking the first post in that thread.

Because one PC with Vivaldi Mail was alright and the other had this weird error, I decided to wipe my email account from the second PC and re-install it again.

And this worked!

Remove email account Restart Vivaldi re-install email account

All clean.
(I'm really not interested what went wrong with the Vivaldi upgrade on that PC 😉 )

There is no need to create a filter for this issue to occur. The steps to reproduce are:

Steps to reproduce issue:

create a new folder delete folder created in step 1
​

What should happen:
Folder should be deleted
​
What actually happens:
Log message similar to following appear:
background-common-bundle.js:1 [MAIL - imap, [email protected]] Filter not found for [email protected] FilterName

Folder is still displayed by Vivaldi but is deleted from server

Issue can be reproduced in:

Vivaldi 6.9.3447.37 stable
Vivaldi 6.9.3447.34 snapshot

Workaround:
Recreate deleted folder to temporarily resolve issue until fixed.

@svetloslav said in Mail client:

I have a separate, portable instance of Vivaldi,

What does this mean?
Are you referring to a "Standalone" version with no extensions (or password storage etc.)?

A bug report on this same issue, was previously submitted: VB-61069. It has been confirmed and is assigned to a developer.

Thank you guys for your help. I have to sort this issue with our ISP or with our mail provider, I guess.

I will delete now the test account since we have the proof that Vivaldi is not guilty ! Thank you again.

I have now used the additional account for a while and I am seeing an overall error which goes all the way back to where the email is located. Going to the original email at AOL. The email in the inbox after a little bit of time are automatically added to trash. I have the same issue at Vivaldi. The inbox is empty. I have to check the main account (top level) root to go through email. The account root contains all the trash and spam emails.

I get this error message:
[flushBuffer, [email protected], Sent]Error: UID STORE Command arguments invalid

I was about to filter so that I have the regular email (in this case trash email) go through that I can check in a filter/label or something else. So that I have an area I can check for regular email that does not include all the spammed emails. All emails have the trash icon or the spam icon in them for this specific account that contains an error all the way from AOL.

@paaljoachim You're welcome. Glad I was able to assist.

@WildEnte said in CPU usage seems quite high:

@mossman this is not just AMD CPUs I think, about 2 years ago I had the issue with an INTEL CPU. We have this thread and another one running concurrently, in the other thread it's mentioned that the bug is reported as VB-99127 which is still open and unconfirmed because reproducing it by testers hasn't succeeded yet.
https://forum.vivaldi.net/topic/84788/mail-calendar-feeds-hogging-cpu/26?_=1724756928734

Surprising that it's not been reproduced - unless I'm very unlucky that it affects two machines I use a lot and both happen to be AMD processors... yet on the Intel machines it doesn't happen at all.

(it's not due to profile corruption etc. since one is only a year old and mail was recently added on the other, also it was the same when I added mail to my wife's profile)