I agree about eM Client being the best alternative to Outlook or just about any other email client out there, and why I use it as my day to day email client.
That being said I don’t experience any of the issues you describe, and based on my reading of this forum a lot of the issues (not all, bugs do get fixed in eM Client) seem to be email provider based or another software interfering with eM Client operation. I have noticed Yahoo and Office365 outages which caused short term red errors in my eM client which usually were due to an actual outage, or back-end server changes that break eM Client. In other instances users have software installed like a virus scanner that is trying to scan emails (including attachments) which break eM Client.
In many instances the email provider doesn’t follow mail server specs very well, and thus eM Client has to make work arounds to handle the way specific providers manage things. For instance when it comes to your attachment issues, the best options have been:
- Set eM Client to “Download messages for offline use and to search in message bodies” and “Include attachments to search in attached documents”.
OR if #1 doesn’t work, then:
- Download the emails as RAW, as described here: What is raw download?
If you have multiple email accounts setup at multiple providers, then is it only one provider having these issues? For example, are the attachments an issue with a single provider? If it is across all providers, then have you tried disabling all virus scanners? That is the way I would consider diagnosing issues with eM Client, trying to figure out if it is a eM Client issue, or a email provider issue.
I can say in my personal experience eM Client has been great when using IMAP/SMTP/CalDAV/CardDAV with a good email provider. I have noticed issues with Yahoo from time to time, but those ending up being server based issues that went away on their own. Office 365 and Yahoo broke at one point due to the Oauth change both those providers made which required the email account to be removed and added again. GMail and Office365 at times throw sporadic errors, that just go away so I assume they are server based, but don’t happen all the time.
The only known issue I have currently with eM Client 9.2 is sometimes I have to close it and re-open eM Client when going in and out of Windows sleep mode. Of course I know going in and out of sleep mode can confuse software, and having to close and open eM Client is not that big of a deal to myself. Besides that I know eM Client can be sensitive to network connection drops, and when that happens even a very minor one, it will give you a red triangle. If you click the red triangle it will refresh the connection and all is good again. Those are the only two ongoing things I have to work around currently.