A few days ago I did a slackpkg update-all which included a sshd update among other things. Since the update Thunderbird has not been able to login to me email account which I assume has something to do with the upgrade and the new sshd. In Tbird I'm using STARTTLS and normal password. My question is this: is there a setting in sshd_config that needs to be tweaked for this to work again?

ssh shouldn't be involved unless you are tunneling into the email server or something like that. Tbird uses SSL which is a different protocol from SSH.

Check which packages were updated by looking at the dates in /var/log/packages and let us know. We also need to know what stack you are using for your mail server to further help. I'd also recommend checking your mail log file for errors. This is typically /var/log/maillog , but it depends on your setup.

I've found I have to tweek the following whenever I upgrade sshd:
In /etc/ssh/sshd_config:
In /etc/ssh/ssh_config

Sorry for not replying sooner ,,, network was down at home. Thanks for the replies. Yes, Richard, I was wondering what sshd would have to do with it as well.

Gerardo, here's a list of the most recent upgrades:

-rw-r--r-- 1 root root 26K Feb 23 13:03 xscreensaver-5.34-i486-1_slack14.1
drwxr-xr-x 2 root root 68K Feb 23 13:03 ./
-rw-r--r-- 1 root root 25K Feb 23 13:03 php-5.6.17-i486-1_slack14.1
-rw-r--r-- 1 root root 1.6K Feb 23 13:03 openssl-solibs-1.0.1r-i486-1_slack14.1
-rw-r--r-- 1 root root 34K Feb 23 13:02 openssl-1.0.1r-i486-1_slack14.1
-rw-r--r-- 1 root root 2.1K Feb 23 13:02 openssh-7.1p2-i486-1_slack14.1
-rw-r--r-- 1 root root 91K Feb 23 13:02 mozilla-thunderbird-38.6.0-i486-1_slack14.1
-rw-r--r-- 1 root root 61K Feb 23 13:01 mozilla-firefox-38.6.1esr-i486-1_slack14.1
-rw-r--r-- 1 root root 2.4K Feb 23 13:01 libsndfile-1.0.26-i486-1_slack14.1
-rw-r--r-- 1 root root 69K Feb 23 13:01 glibc-zoneinfo-2016a-noarch-1_slack14.1
-rw-r--r-- 1 root root 2.8K Feb 23 13:01 flac-1.3.1-i486-1_slack14.1
-rw-r--r-- 1 root root 1.9K Feb 23 13:00 dhcp-4.3.3_P1-i486-1_slack14.1
-rw-r--r-- 1 root root 20K Feb 23 13:00 curl-7.47.1-i486-1_slack14.1
-rw-r--r-- 1 root root 7.3K Feb 23 13:00 MPlayer-1.2_20160125-i486-1_slack14.1

I'm not sure what you mean by 'stack' with respect to Thunderbird. No error messages in /var/log/maillog.

Slacker1227, these are the settings that I use also.

Again, thanks for the replies. I always appreciate the help I get here.

Well, I'm almost too embarrassed to admit the cause of this particular problem. Dovecot wasn't running. There's a rc.dovecot script in /etc/rc.d that I made executable but I forgot that it doesn't start by itself. I've put it into rc.local now so it shouldn't be a problem down the road.

Cheers.