[Users] Error occurred on authentication ??

[Peter Richards]

version 3.17.4
Kubuntu 19.10

This is a somewhat similar problem as discussed at
https://lists.claws-mail.org/pipermail/users/2020-May/026192.html
( [Users] Claws Mail using 100% CPU )

Whilst it isn't causing high CPU, I'm now getting "error occurred on
authentication" on EXACTLY the same account as the high CPU issues. I
did attempt to chase the high CPU and timeouts with the ISP, however
they required more detailed information or suggested I use a different
email client.

Running Claws with the debug option ..

=========
inc.c:852:getting new messages of account Aussie - Peter...
** Message: 15:07:47.290: Account 'Aussie - Peter': Connecting to POP3
server: mail.aussiebroadband.com.au:995...

ssl.c:423:Set GnuTLS session server name indication to
mail.aussiebroadband.com.au, status = 0 ssl.c:451:setting certificate
callback function ssl.c:311:waiting for SSL_connect thread...
ssl.c:329:SSL_connect thread returned 0
ssl_certificate.c:270:got 127 certs in crt_list! 0x7ffd0e254c48
ssl_certificate.c:449:got
/home/********/.claws-mail/certs/mail.aussiebroadband.com.au.995.cert
first try ssl_certificate.c:270:got 1 certs in crt_list! 0x7ffd0e254a98
ssl_certificate.c:459:got cert 0x20852f0 ssl_certificate.c:185:writing
2252 bytes ssl_certificate.c:185:writing 1688 bytes
ssl_certificate.c:185:writing 1338 bytes
file-utils.c:58:TIMING safe_fclose : 0s043ms
session.c:220:session (0x1e02800): connected
[2020-06-19 15:07:47] POP< +OK Hello there.
[2020-06-19 15:07:47] POP> USER *****************@aussiebroadband.com.au
[2020-06-19 15:07:47] POP< +OK Password required.
[2020-06-19 15:07:47] POP> PASS ********
[2020-06-19 15:07:52] POP< -ERR Login failed.

** (claws-mail:8978): WARNING **: 15:07:52.642: [2020-06-19 15:07:52]
error occurred on authentication

POP: -ERR Login failed.
session.c:394:session (0x1e02800): closed
folder.c:4318:*TMP* already created
/home/********/.claws-mail/tempfolder/processing-16
folder.c:2183:Scanning folder processing-16 for cache changes.
mh.c:299:mh_get_num_list(): Scanning processing-16 ... mh.c:1471:MH:
forced mtime of processing-16 to 1592280354 msgcache.c:599: Reading
swapped message cache from
/home/********/.claws-mail/tempfolder/processing-16/.claws_cache...
msgcache.c:615:using Noop Converter msgcache.c:787:done. (0 items read)
msgcache.c:788:Cache size: 0 messages, 0 bytes msgcache.c:818:reading
swapped mark file. msgcache.c:912:reading swapped tags file.
folder.c:2742:TIMING folder_item_read_cache : 0s000ms
folder.c:2603:Total cache memory usage: 44723
msgcache.c:271:TIMING msgcache_get_msg_list : 0s000ms
msgcache.c:271:TIMING msgcache_get_msg_list : 0s000ms
filtering.c:198:checking 0 messages

** (claws-mail:8978): WARNING **: 15:07:52.647: [2020-06-19 15:07:52]
Authentication failed.

alertpanel.c:253:Creating alert panel dialog...
alertpanel.c:211:called inc_lock (lock count 1)
alertpanel.c:221:called inc_unlock (lock count 0)
alertpanel.c:105:return value = 1
mh.c:237:MH scan not required:
/home/********/.claws-mail/tempfolder/processing-16 (1592280354 <=
1592280354) folder.c:2767:Save cache for folder
#mh/TEMP_FOLDER/processing-16 msgcache.c:1183:        Writing message
cache to (null) and (null)... msgcache.c:1231:done.
msgcache.c:1232:TIMING msgcache_write : 0s000ms mh.c:1471:MH: forced
mtime of processing-16 to 1592280354 session.c:268:session (0x1e02800):
destroyed folderview.c:2268:newly selected 0x1da72c0, opened 0x1d90720
summaryview.c:1292:called inc_lock (lock count 1)
summaryview.c:1366:empty folder ((nil) (null) (nil) 0)
summaryview.c:1378:called inc_unlock (lock count 0)
summaryview.c:1379:TIMING summary_show : 0s006ms

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

There are 10 POP accounts setup with Claws. Two of those are email
accounts with ISP aussiebroadband.com.au , and both those two are
failing to connect with authentication errors. The login details have
not been changed. Looking at the Claws network log the last few days,
the other 8 POP3 accounts all connect within one second, yet it seems
the 'aussiebroadband.com.au' fail after 5 seconds. Notice this ..

[2020-06-19 15:07:47] POP> PASS ********
[2020-06-19 15:07:52] POP< -ERR Login failed.

the 5 seconds, whilst all the other POP3 accounts login within 1 second
??

The only setting I can find in Claws is the timeout one, and because of
the high CPU issues I had to set that to 53 seconds. Is there a Claws
setting somewhere that determines some sort of login timeout or similar
?

The ISP asked for more details, yet the Claws debug won't really tell
them anything. Is there some sort of command I can issue to give me
more info being returned from their email server ? Like a telnet login
or similar, high level of details coming back from the email server
side ?

What is strange is that my actual ISP to connect to the internet IS 
this ISP. GMail and Yahoo accounts and another server have no problems
at all. The network speed is very good, lots of bandwidth.

Regards,

Peter