Any solution yet. Mailspring was working perfectly and suddenly just received this message ;(((
Same error. It is really annoying without email client working with Gmail :<|
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I’m having the same issue. I have 2 google accounts connected, and have for a year or two.
Only one account is having this issue, but it’s preventing me from using Mailspring.
Would love to see a developer response in this thread. I’d love to continue to use Mailspring, but I won’t be able to go without a working email client for long. I’ve tried reinstalling, switching from a user to a system-wide flatpak, combed through my google settings to see if I could add an exception to allow connection. Don’t really have any other ideas.
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I hope this gets addressed soon, Mailspring is the one email client I’ve been able to get used to, hoping I don’t need to switch.
I read around a bit and this doesn’t seem like something that can be bypassed by the user in google settings or anything. Seems more like Mailspring is not complying with newly enforced security standards by Google.
Bump… no response from Mailspring? 
The solution is simple!
protip: read the logs
This was in my log.
2 NO [ALERT] Application-specific password required: https://support.google.com/accounts/answer/185833 (Failure)
Basically you have to create an app specific password for Mailspring. Go to this link (Create and manage your app passwords - https://myaccount.google.com/apppasswords ) & create a new app password specific for mailspring. Name the app password whatever you want. Go nuts and name it something like “Mailspring” then you’ll be prompted with that one time password. Copy it with the spaces and everything included.
Now in Mailspring click the Reconnect button in red that you’re prompted with. It’ll give you a link and / or open a new browser window. Don’t connect that way, instead in the mailspring prompt with the link it provides hit the back button and reconnect the account using IMAP. In the Password field you would enter the password you created for the app from the link above. The account should reconnect after those credentials are entered. Just make sure you change the SMTP port to 465.
I hope this helps! 
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works perfectly with https://myaccount.google.com/apppasswords
need to activate 2 factor verification before you generate app passwords
Interesting. I may give this a go, then. I’d moved on to Thunderbird (which is better than I’d remembered), so I may not return to Mailspring, but I did like it (when it worked)
I’m guessing this would likely solve the 2nd major issue I had with it: it was requiring me to reauthenticate each time I restarted (or logged in to) my OS.
Thank you finally i got mailspring working because I have used this for almost 3 years switching from Thunderbird. just use SMTP instead of Google login create app from https://myaccount.google.com/apppasswords and enter the password
Thank @ameddonado
It’s a shame such a major problem doesn’t get any attention from the team though. This is a strong reason for me to look for a better maintained alternative.
The app password workaround does not appear to work with custom domains. Unless I am missing something. Considering how good em Client is and how much better Thunderbird has become I can’t justify the 45+ minutes I have spent trying to setup only 1 of my 8 accounts. At this rate it will take an entire day just to get Mailspring setup with the basic email connections, nevermind all of the personilaztion.
Not worth it. Even Google doesn’t think this is a good idea!
Hey folks, thanks for your patience here - each year, Google requires that we go through a compliance process for continued access to the Gmail APIs. They’ve changed the process slightly every year - for 2021 and 2022, we paid a third party $15,000 for a several month security audit. In 2023 they didn’t ask us to do anything, and this year there’s a new process involving some automated code scanning and review.
I’m optimistic that Gmail OAuth will be restored in early September, but their process is heavily geared toward simple cloud-based integrations with Gmail and not desktop clients. They want us to “securely store OAuth credentials”, and it’s increasingly difficult to explain that we don’t store them at all, they’re saved in your computer’s keychain and never sent to the cloud.
Long story short:
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I expect OAuth for Gmail will work again soon, once we’ve satisfied Google’s updated compliance requirements.
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In the meantime, you can:
- Use an App Password (https://myaccount.google.com/apppasswords) and sign in to Mailspring using the IMAP/SMTP option
- If you are using Google Apps for Business, have your administrator visit https://admin.google.com/u/1/ac/owl/list?tab=configuredApps, choose “Configure new app”, search for “Mailspring”, and grant it access explicitly.
It appears that Google is not blocking all existing Gmail accounts that have authenticated with Mailspring already, so if you’re already logged in you may not need to take any action.
Sorry again for the hassle, I use Gmail with Mailspring myself so this has been very annoying. If you pay fo Mailspring Pro, email me at ben@foundry376.com, I’d be happy to refund your subscription.
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Hey folks! Thanks for your patience - it looks like we’ll be through the CASA security audit with TAC Security in the next couple days, and you should be able to add Gmail accounts again very soon. Sorry for the hassle. I’m hopeful that Google sticks with this new process for a few years now that we’ve aligned the app and documentation.
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Great hope things are on track again
I don’t think people can use mailspring for professional use. It’s more than a month that i’m waiting for google issue to be solved.
This is a demonstration of what happens with opensource. I know everyone have multiple things to do but … how a product can be offline or without using one of the most used account of the world more than 2 months?
You could make the difference because Thunderbird, Evolution, Geary have so bad panels for mails and looking that you outclass them… you could …
HI,
I tried your instructions but unfortunately I have a problem sending the email.
I have enabled two-step verification, enabled the user-specific password and configured Mailspring for Gmail using IMAP and SMTP but despite everything working fine and I can download the mail, and despite receiving the email from Mailspring that SMTP has been configured correctly, when I try to send an email, I receive the message that the username and password are not validated.
Are there any solutions?
This worked for me, thank you for the tip!
@bengotow Any updates on Google OAuth code scanning and review? Another thread popped up of people not aware of your posts in this thread:
Google authentication issue - Help - Mailspring Community (getmailspring.com)
Update: I completely missed your previous post! Thanks for the update.
Hi there - we’ve been working with Google to restore Mailspring’s access to the Gmail APIs and it was (finally) restored yesterday! If you go through the “Add Account” flow again, you’ll be able to link your Gmail account properly.
I apologize for the delay - this took longer than I expected to get resolved. You can read a bit more information about this here: [Resolved] Gmail "This App is Blocked