[Users] Unable to send to my university account (IMAP)

[John Jason Jordan]

Claws Mail 3.9.3 from repositories on Xubuntu 14.04, up to date.

I have had my university e-mail account set up with IMAP for several
years. Until recently there has been no problem, but recently I am
unable to send. Receiving, however, still works fine. In the
configuration for the account sending and receiving are set with the
same password.

 I copy and paste here from the log after a recent failed send:

[21:17:44] IMAP4- [fetching flags...]
[21:17:44] IMAP4> 151 UID FETCH 1:* (FLAGS UID) 
[21:17:44] IMAP4< * 1 FETCH (UID 152
[21:17:44] IMAP4<  FLAGS (\Seen)) 
[21:17:44] IMAP4< 151 OK Success 
[21:17:44] IMAP4> 152 APPEND Queue (\Seen) {1174} 
[21:17:44] IMAP4< + go ahead 
[21:17:44] IMAP4> [data - 1176 bytes]
[21:17:44] IMAP4< * 2 EXISTS 
[21:17:44] IMAP4< 152 OK
[21:17:44] IMAP4<  [APPENDUID 651579169 153] (Succes
[21:17:44] IMAP4< s) 
[21:17:44] IMAP4> 153 UID STORE 153 +FLAGS.SILENT (\Seen) 
[21:17:44] IMAP4< 153 OK Success 
[21:17:44] IMAP4> 154 UID STORE 152 +FLAGS.SILENT (\Deleted) 
[21:17:44] IMAP4< * 1 EXPUNGE 
[21:17:44] IMAP4< * 1 EXISTS 
[21:17:44] IMAP4< 154 OK Su
[21:17:44] IMAP4< ccess 
[21:17:44] IMAP4> 155 EXPUNGE 
[21:17:44] IMAP4< 155 OK Success 
* Account 'PSU-JOH2': Connecting to SMTP server: smtp.gmail.com:465...
*** SSL handshake failed
*** Error occurred while sending the message.
[21:17:45] IMAP4> 156 UID STORE 153 +FLAGS.SILENT (\Deleted) 
[21:17:45] IMAP4< * 1 EXPUNGE 
[21:17:45] IMAP4< * 0 EXISTS 
[21:17:45] IMAP4< 156 OK Su
[21:17:45] IMAP4< ccess 
[21:17:45] IMAP4> 157 EXPUNGE 
[21:17:45] IMAP4< 157 OK Success 
[21:17:45] IMAP4- [fetching UIDs...]
[21:17:45] IMAP4> 158 UID FETCH 1:* (UID) 
[21:17:45] IMAP4< 158 OK Success 
[21:18:27] IMAP4> 159 NOOP 
[21:18:28] IMAP4< 159 OK Success 

I hope someone can give me some clues.