[MlMt] can send mail but new mail doesn't download into inbox

[Bill Cole]

On 30 Sep 2020, at 14:40, Ken Pope wrote:

> I’m using MM 1.13.2 (5673) on Catalina 10.15.7.  Everything perfect 
> until a few hours ago when: (a) although I can send mail, new mail 
> doesn’t appear in my inbox; (b) my account (ken at kenpope.com) under 
> “sources” turned red, and all the boxes under it went from black 
> to light gray; & (c) although new mail doesn’t appear in the inbox, 
> it *does* appear under “sources” if I highlight the red source 
> account.

Does the account and its folders all have "(offline)" appended to their 
names in the Sources list?

Have you tried selecting the account and using 'Mailbox->Take 
"[accountname]" Online'?

> Although MM is my main client, I have 4 others (Mail, GyazMail, 
> Airmail, & Postbox) that I use solely to download mail and provide 
> backups—the ken at kenpope.com continues to download and appear in 
> their inboxes.
>
> Any idea about what’s gone wrong and how I can fix it?

One possibility with so many clients accessing the same account is that 
you're hitting a server-side limit on simultaneous connections, either 
from the same IP or to the same account. MM usually pops up an alert 
when that happens, especially with per-account limits (which look like 
authentication errors) but when the connection is simply ignored at the 
network level there may be no useful reason to do anything beyond 
offlining the account and turning it red.

-- 
Bill Cole
bill at scconsult.com or billcole at apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire