I have a couple of email accounts that I need to monitor daily. Years ago I used Thunderbird so that all of my emails would be in one place on my computer - one stop shopping. Is Thunderbird still the goto for that or is there something better now?
I need the app to access yahoo mail and gmail.
Thunderbird supports both Yahoo and Gmail so there should not be any problem. Is there a reason you stopped using it?
I had it like 3 computers ago. Just forgot about it until a week ago when I said, “It would be nice to have a program that downloaded all of my mail accounts into one spot on my computer.” 
I still use it on my laptop, and it works fine, too the point that I haven’t thought about it since I set it up.
Comcast forced me to stop using Eudora a few months ago, so I switched to eM Client, and I like it (although I miss Eudora). If you want to upgrade to something newer you might want to consider it.
It works fine for me. I use it for work and personal email (IMAP accounts), other work email (Office 365), several Gmail accounts, and iCloud. With Office and Gmail it does use OAuth 2.0. I think it uses OAuth with iCloud, but it could be an app specific password.
So yeah, it handles lots of different accounts without any issues. It can copy email between them. It also has sane defaults as far as sending email from the appropriate account when replying.
Noooooooooo!!! Eudora is the bomb. Sorry you had to drop it.
My overwhelmingly preferred email client is Microsoft Outlook. Unfortunately my useless ISP without warning stopped supporting app passwords in their email service, and my version of Outlook doesn’t support Oauth 2.0. So I’ve been forced to use Thunderbird which I hate with a passion, although at least some of that is just that it’s different from what I’ve been accustomed to for years.
But I think in terms of appearance and functionality Outlook is objectively far, far better, although of course it’s not free. Among the many Thunderbird “features” that I hate is that it keeps multiple email exchanges (original email, reply, reply to the reply, etc.) as a single “conversation”. Also it creates a new tab every time you open an email, and lots of other things like that that are drastically different from how Outlook works. Thunderbird also seems buggy with respect to how it uses fonts.
I can’t even integrate my old email archives since Thunderbird’s import function from Outlook PST files has apparently been broken for years. So instead I use a buggy third-party app to periodically move my emails from Thunderbird to Outlook which remains my email system of record since it still works fine with Gmail.
YMMV. Lots of people use Thunderbird.
I’ve been using Thunderbird as my primary email client for a couple of decades and it works great for integrating several email accounts.
Thunderbird doesn’t do either of those things for me. The first is controlled by View->Sort by->Unthreaded. I’m not sure about the second; maybe you’re double-clicking instead of single-clicking an email to open it?
+1 for thunderbird. Been using it for over 10 years for several accounts.
Sorry for a hijack, but I’m curious how they did that. I have Comcast email and I use their native client, but I have often thought of trying a 3rd party app to bring my three email accounts together in one place.
I don’t know about Eudora but a lot of older email clients don’t support Oauth2 authentication which for some stupid inexplicable paranoid reason some email services are now demanding.
Well for about 6 months (or more) my husband and I (who each used Eudora) got periodic warning emails from Comcast that certain unnamed email clients would no longer be supported after a certain date due to their inability to handle certain security restrictions. They didn’t specify which clients and which restrictions but it looks like @wolfpup nailed it. So as the deadline approached I switched to eM Client. My husband didnt’t switch and a few weeks later, Eudora stopped working for him. I’m not sure what the sympton was for “not working,” but anyhow, he could use it no longer. This happened roughly 3 months ago.
Apparently Comcast knew what clients we were using (or at least they could identify what functionality was missing), so I guess that’s why @Roderick_Femm didn’t receive any notice about the change.
My “View” menu has no “Sort by” option – just “Toolbars”, “Layout”, and “Folders”, and none of them has any such option. I even tried changing the “mailnews.default_view_flags” option in the configuration editor, to no effect. I’ve looked at every possible option in the settings and cannot find a way to turn off threading. As for opening a message, the only way to open it is by double-clicking which opens in a new tab, or right-clicking and then you get the option of opening in a new tab or a whole new window.
ETA: Fixed the threading problem. It seems that as of Thunderbird 115 and later, the “View → Sort By” option can only be invoked from the menu bar, which is invisible unless you enable it. It cannot be invoked from the hamburger menu.
I tells ya, I hate this thing. 
I have been using Thunderbird for ages (20 years? longer?) and am still happy with it. Sometimes they update something that forces me to adjust the settings to get it the way I like it again, but I have managed so far. It is an easy an efficient way to manage multiple accounts. I really hope some day they release a version for mobile devices, have even given them a couple of bucks when they asked for it when they hinted they were working on it. Alas! They are not ready yet. I keep hoping.
That’s exactly how I feel about Microsoft Outlook. I’m curious if you’ve ever used it. It’s very common in enterprise environments in conjunction with the Microsoft Exchange server, but it also works extremely well as a POP3/SMTP or IMAP client. Sadly, you need a very recent version to support Oauth2, and that would require me to not only upgrade Office but also to upgrade Windows, and I’m not going to do that just because my ISP is a bunch of inconsiderate jackasses. In fact I’ve been planning to escalate this problem whenever I have some free time and am feeling ornery, perhaps right up to the regulatory authorities. If Gmail is satisfied with the security of app passwords in conjunction with a one-time 2FA, then so should any other competent email service provider.
I suspect that for both of us, familiarity is a major factor. Back in ancient times when dinosaurs roamed the earth, I used Eudora as my first email client, then switched to Outlook for reasons that I cannot recall. I gradually came to love it, especially when I came to better understand various tweaks such as expanding the maximum size of PST files so that absolutely all my emails from the dawn of time were retained and easily searchable.
I did use Outlook in the pre-cambrian for a while, don’t remember why I switched to Thunderbird, I probably did it in one fell swoop when I switched to Firefox (from, eeeh, Netscape?). But I agree: it is down to familiarity. And open source too.
I never had to work in enterprise environments, have always been a free lancer.
Just a tip for those who may be starting out to use Thunderbird for the first time: the menu bar is disabled by default in current versions (at least, it was in my version) and it contains many useful functions. If it’s not present, you should enable it through the hamburger menu via “View → Toolbars”.
I believe you can also make it temporarily show up by pressing the Alt button by itself or press F10. (This is the keyboard shortcut that works in all other programs).
I would actually consider reporting the inability to disable threaded mode without the toolbar to be a bug. It should be either a setting or on the hamburger menu. A lot of people hate that feature: I have it turned off in my Gmail, too.
I don’t like Thunderbird. I find it hard to find emails in it. It has other features i don’t love. But it works fine, and it’s my email client on my “travel” laptop. I’m thinking of moving to something else.
Outlook is okay, but i don’t love it, either. And it’s costy. I don’t use it even in machines where I’ve paid for office, because i prefer Mac Mail. I have something else… Postbox? On another computer which I DO like, but it’s not free. (It’s cheap, though. And my one license has been valid for several years on a couple of devices.)
I may take a look at eM client.