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Gmail app-password with Claws

November 17, 2025 — BarryK

I have been evaluating Claws-Mail as a possible builtin replacement for SeaMonkey Mail. I was not able to get Oath2 authentication to work with Claws, though it was extremely simple with SM; the latter just caused a notification on my phone “Is that you?” and then I was in. Claws on the otherhand, the instructions for Oath2 are horrendous, and for me didn’t work -- the problem was failure to obtain an "authorization code".

Here is a related blog post yesterday:

"shellCMS supports LibreOffice Writer"
https://bkhome.org/news/202511/shellcms-supports-libreoffice-writer.html

I will look at it again, but for now, the old “app password” method does work. This page explains how you create an app password for accessing gmail by imap, pop and smtp:

https://support.google.com/mail/answer/185833?hl=en

Follow the link “Create and manage your app passwords” and after logging in to gmail there will be a window to create an app password. In my case, I have already created one:

img1

In Claws account setup, this app-password has to be entered into the “Password” field:

img2

The other configuration windows are logical. POP must have “Authenticate before POP connection” checkbox unticked:

img3

And SMTP must have authentication set to “LOGIN” and again the app-password:

img4

In the TLS window, "TLS" checkboxes are ticked for both send and receive. Both pop and smtp work. Why is there no “imap” mentioned in any of these windows?

Here are the Claws official instructions for setting up Oath2 with gmail:

https://www.claws-mail.org/faq/index.php/Oauth2#Setting_up_OAuth_2.0_for_Gmail

Anyway, I am going back to SeaMonkey Composer to create blog posts. I found, after some usage, that LibreOffice Writer is too flakey. Images do not stay where they are placed in the page. The is a "Show HTML souce" checkbox in Web-view, except the checkbox mysteriously disappeared from the menu.

I was experiencing so many hassles creating this blog post, so changed back to SM Composer. Now editing is sane. Which means that SM is staying builtin to Easy, which means that Claws won't be.  

Tags: easy