Moving from mutt 1.5 to 1.13.2

[Andrew D. Arenson]

	On a RHEL6 box, using mutt 1.5, I got mutt to work w/ davmail, enabling me to get email from my work Office365 account. 

	I'm transitioning to Ubuntu 20.04, which provides mutt 1.13.2 and have run into a problem that I'd love to get advice on. When I start mutt I get an error: "Encrypted connection unavailable". When I attempt to send an email I get "Error sending message, child exited 127 (Exec error.)."

	I'm not sure where to start with either of these errors or whether or not they are related to each other.

	My .muttrc includes:

set spoolfile="{aarenson\@iu.edu at localhost:1143}INBOX"
set imap_pass="REDACTED"
set imap_keepalive = 10
set certificate_file=~/.mutt/certificates
source ~/.mutt/smime.rc
set smime_sign_as=ab2ec3ec.0

	Looking at the davmail log, on the working, RHEL workstation I see:

... davmail  - Connection from /127.0.0.1 on port 1143
... davmail.connection  - CONNECT - 127.0.0.1:38394
... davmail.exchange.ExchangeSession  - Test configuration status: 401
... davmail  - > * OK [CAPABILITY IMAP4REV1 AUTH=LOGIN MOVE SPECIAL-USE] IMAP4rev1 DavMail 5.5.1-3299 server ready
... davmail  - < a0000 AUTHENTICATE LOGIN
etc.

	On the not working, Ubuntu workstation the first four lines are the same, but then:

... davmail - < a0000 STARTTLS
... davmail - > a0000 BAD command and authentication required

    	I tried forcing STARTTLS to 'no' with:

set ssl_starttls=no

	... but that had no effect.

	Any ideas on where to look next?




-- 
Andrew D. Arenson (he/him)                              H 317.964.0493
arenson (at) spatzel.net                                C 317.679.4669