To us Eudora folks, the program is simply a clean machine.  Granted, you do not have many open independent actions/windows on the Taskbar like you do with TheBat!, Thunderbird and some others.

Imap is not an issue to me. Especially not Gmail Imap.  The numbers never seem right. The actions downhill never seem to take uphill. If I have to access my home base email from a juice bar or cafe, I use Teamviewer, but that is very rare, especially as I use Google accounts in special ways (one for personal important finance and stuff, one for biz on Gsuite, one for travel info, etc.)  If I am travelling for a week or three I usually take the time to put the 100 GB or so home base downloads on my laptop.  Granted, every 5 or 10 years I consider an archive method of putting all the old email in its own spot.

I tried Pegasus, I did not keep notes, it is a good program, I just thought it was not up to Eudora on some of the essentials of filtering and searching.  Maybe the editor was not as crisp, and Eudora has incredible stability. Stuff like that. For fun, I could try it again, especially when 5.0 comes out, see the blog post from a few months ago, where Dave explains some health issues that slowed him down (this year, I am putting aside back years). The forum looks good, one gentleman was upset about moderation of even long-time members. It is not super-active like the Eudora community, a decade and more after Eudora ended.

It is possible the Hermes installer has some funky-dunky elements.  It might be crisper to load the latest Version 7 Eudora, and then copy over the four files from Hermes that essentially fix Eudora for encryption/TSL. That is the impression I got from some posts on the Eudora forum. 

btw, the Eudora forum I mentioned does have a pseudo-archive, that is triggered by searching by sending an email with the search terms.  I am trying it out.  And there is a Yahoogroups second forum that is good also.  TheBat! online forum is ok as is a different email forum. Right now I am trying to find out why the redirect action on filters seems to trigger in manual mode when it is only an Inbox-download filter.  This is the type of stuff where TheBat! can be negatively quirky.

The Bat!, with its virtual folders, is my main program.  I don't think I would switch unless there was a similar virtual mailbox implementation somewhere else.  Does anyone know of a try?  I think Courier had permanent searches, that perhaps got updated, which can be more or less the same thing.

Steven

And their support forum is active.

Altap Salamander Support Forums
https://forum.altap.cz/index.php?sid=c586096de7a21120a57dd1c704e726b7

Most of my email play is on:

Verizon mail - grandfathered to AOL. (downloaded by POP)

Runbox (small account, downloaded by POP)

Various Gmail accounts that simply forward to the Verizon-AOL and then any deletion of the Gmail is at leisure, usage is mostly "that day" or if for some reason my home base client is less accessible. It does work well with my iPad .. especially the biz email, or resets of passwords, etc.

==================

Eudora 7, a fantastic email program, is hitting more modern encyrption demands like TSL 1.1 and 1.2.  This means that the original Eudora 7 download will, in some cases, (and increasing) not download mail.  The server will time out, or refuse the connection.

Hermes is a new project built on the Eudora source code, which Qualcomm, after some hesitation, nicely put into the public domain! The main purpose is to fix those areas, like encyrption and certificates, where Eudora might fail. E.g. specific .dlls might be replaced. Other things might be updated, like fonts or emojies.  It is unlikely that much of the core code would be rewritten, since the tools today are very different than 25 years ago. 

(Penelope was a Thunderbird attempt to have a Eudora look-and-feel that went nowhere.)

Pandora is an excellent attempt to make a "Eudora-like" program by a gentleman named Brana. It can be discussed separately. Note that it has the potential to add some features, (e.g. virtual mailboxes would be possible, although I do not expect that they are currently on the road-map).  Feature improvements is very limited for Hermes, since the core code is Eudora.  However, it has recently become ready for prime-time.

And I mostly use Eudora and TheBat!, later in the thread I can explain why I use both.  And I also play with Pandora.

=================================

Quick mention of about ten other email programs.

Other less techie and robust alternatives include eM Client, the more Outlook-type program that some use. Claws Mail is another. Mailbird has proponents.  Postbox too. Thunderbird is still active. SeaMonkey is a minor player, also like Postbox built on Thunderbird. Outlook has its own world (and maybe PIM clones like Essential PIM?) em Client also compares themselves to Mail and LiveMail.

In somewhat of a purist email legacy mode we have Becky!, Pegasus and Poco-Barca, yet each one has its current situation. 

I have tried many of these, and always come back to a Eudora-TheBat! world.

=================================

Information largely from the

Eudora for Windows forum (no archives, I am using my inbox)
http://www.listmoms.net/eudora-win/

Join this for any future updates.

Posts from Ken starting around Feb. 27, 2019.  Ken had improved the Hermes instructions. 
(Also contributions from hoplist, Dave Andrews, and the super-helpful Katrina Knight.)

There is also a check that you have the proper "MS C ++ redistribution".

==================================Y

You can navigate to your Eudora program files folder and check the dates of libeay32.dll, QCSSL.dll, rootcerts.p7b, and ssleay32.dll.  If QCSSL.dll is dated any earlier than Oct. 29, 2018 (or if any of the other 3 files date earlier than Aug. 15, 2018), you don't have what you need to ensure Eudora is working with TLS 1.1 and 1.2, which are increasingly required by mail servers.

Here are some instructions for getting this updated library installed into your Eudora 7.1:

=======================

This is not complicated, simply explained step-by-step,

INSTRUCTIONS FROM JULY 19, 2019 TO MAKE AN EXISTING EUDORA INSTALL TSL-CERTIFICATE UPGRADED USING HERMES TECHNOLOGY

Although the developers working on Hermes haven't yet released that, they HAVE released an updated SSL library for Eudora that you can patch right into your existing copy of Eudora 7.1.  It will (1) resolve a lot of certificate problems, and (2) add support for TLS 1.1 and 1.2, which will keep Eudora working with mail servers that have dropped or will soon drop support for TLS 1.0.

(If you've been using the Stunnel tool specifically to get around this limitation, this updated SSL library will eliminate your need to use that.  It will add support for the missing protocols, while ensuring that everything about your data communication will remain encrypted.)

To install this updated SSL library into your existing Eudora installation:

(Use at your own risk: I am unaffiliated with the Hermes project, but merely a satisfied user trying to make things easier with these instructions.)

1) Download this ZIP file and extract it somewhere:  NOTE: If you downloaded this already but before Oct. 29, 2018, you'll need to download it again now, because the pre-Oct. 29th version wasn't fully functional.
   https://www.dropbox.com/s/pqcmt3sa5aknf9w/HermSSL.zip?dl=1

2) Find your Eudora program files folder, via:
   - Eudora's top menu: Help -> About Eudora -> Click on the word "Application" above the "Visit Web Site" button.  This should launch a folder window with your Eudora program in it, which will include the "Eudora.exe" file.

3) Close the About Eudora box, and Quit Eudora

4) Make backup copies of these 4 files that are in your Eudora program files folder: libeay32.dll, QCSSL.dll, rootcerts.p7b, ssleay32.dll

5) Run vcredist.exe that you extracted in step 1.  You might already have a new enough version of this Microsoft library on your system, in which case it will tell you that and will abort.  That's fine: it means you already have the needed Microsoft library and can proceed to the next step.

6) Copy these new 4 files you extracted in step 1 (libeay32.dll, QCSSL.dll, rootcerts.p7b, ssleay32.dll) into your Eudora program files folder. You'll see they're from 2018 instead of 2006.

7) Start Eudora.

8 ) Attempt to retrieve email and send email with your personality/ies.  Most certificate errors should be gone, and sending and receiving should be functional.

9) Something not working?  Then check your incoming and outgoing mail settings:
   (Your main settings are under Tools->Options->"Checking Mail" and "Sending Mail".  They're additionally in each of your Personalities that you use to send and receive mail: Tools->Personalities, and then for each personality, right click, Properties, and look at both tabs "Generic Properties" and "Incoming Mail".)
   In each of those two places, look at the "Secure Sockets when Sending" / "Secure Sockets when Receiving" dropdown.  If you see "If Available, STARTTLS" or "Required, STARTTLS" in any of those places, some mail servers might need you to change those to "Required, Alternate Port".  If you try changing this, make note of the old setting, in case you need to change it back.
   Try retrieving and sending email again.

10) If you're using a server that has support for TLS 1.1 or 1.2, you can verify that Eudora is now using one of these: Go to each of the two places described in step 9 (i.e. in "Options" and/or as any Personality you've successfully connected with since restarting Eudora).  In each, press the button "Last SSL Info".  On the info window that pops up, find the "SSL version field".  You should see "TLSv1.2" or "TLSv1.1", instead of "TLSv1", which will confirm that the new libraries are now using the new protocols with those servers.

=======================

Sidenote:
A brand-new clean Eudora Install is said by Nicholas Edward Werner-Matavka of Hermes on July 25 to work - with this download:
https://sourceforge.net/projects/hermesmail/files/hermsetup.exe/download
(In other words, the necessary file swaps are already included in this installer.)
Ted Walton and Katrina have discussions of using this method on August 5, especially if you are transferring over from one puter to another.

=========================

Free thinking notes

Additional programs I might want to check, for various reasons
https://www.g2.com/products/chaos-intellect/competitors/alternatives
Chaos Intellect from Rose City (they had Courier in the old days)
Zimbra - (free, open source??)
Good ol Zoho (Salesinbox) and an Amazon Workplace thingy

For other reasons -
Kiwi for Gmail-Gsuite (also Propeller) - reminds me of Streak and NetHunt)
Spike Shift

==========================

ADDED 8:16
Mailspring - pro is $8/mo
Opera Mail
Yahoo Mail (does it have desktop client, probably8 browser only)
iCloud - Apple
AOL

BlueMail in beta
FileOne

collaboration tools like Front and Spike and MailCore might have email embedded.
Other quirkies like KnowMail - Rainloop
Foxmail
Inky
Incredimail

Proton Mail (mentioned for security, not a client, has apps, as do Fastmail, etc)
Runbox (I use this for a special Pop-box)
See Slant and G2

Steven