Bad Server Responce

[jawaman]

i have configured a smtp account and was able to send emails.
But a few days ago i started to get this error "Bad Server Responce", i had looked into log file, witch i will quote,

"[2016-05-23 08:50:37] Espo.ERROR: API [POST]:/:controller, Params:Array ( [controller] => Email ) , InputData: {"status":"Sending","isRead":true,"isImportant":fa lse,"inTrash":false,"isUsers":false,"isHtml":true, "isSystem":false,"isJustSent":false,"assignedUserI d":"1","assignedUserName":"André Ferreira","body":"<p><br></p><br><p><span style="font-size:12.0pt;color:#1F497D">Bla Bla Bla</span></p>","attachmentsIds":[],"attachmentsNames":{},"attachmentsTypes":{},"to": "******@gmail.com","subject":"Teste","parentType": "Account","parentName":null,"parentId":null,"from" :"*****@*****.**","bcc":"","cc":"","selectTemplate Name":null,"selectTemplateId":null,"bodyPlain":"\n \nBla Bla Bla "} - SQLSTATE[HY000]: General error: 2013 Lost connection to MySQL server during query [] []
[2016-05-23 08:50:37] Espo.ERROR: Display Error: SQLSTATE[HY000]: General error: 2013 Lost connection to MySQL server during query, Code: HY000 URL: /api/v1/Email [] []
"

[yuri]

Never encountered this. Maybe you need to increase wait_timeout,connect_timeout or max_allowed_packet

[jawaman]

I also tried the "forgot pass" and it also failed.

"[2016-05-23 09:08:19] Espo.ERROR: API [POST]:/User/passwordChangeRequest, Params:Array ( ) , InputData: {"userName":"andre","emailAddress":"******@****.pt ","url":"http://example.eu/#"} - Connection timed out [] []
[2016-05-23 09:08:19] Espo.ERROR: Display Error: Connection timed out, Code: 500 URL: /api/v1/User/passwordChangeRequest [] []"

[tempus]

This morning I was trying to fix Error 1267. Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation '=' and got this "Bad server responce" too.
I fixed by making "id" fields in tables to utf8_unicode_ci collation.
"Bad server responce" gone.