Sending a test email generates a big error.

Here’s the generated error:

2016-07-13 06:07:46	Connection: opening to ssl://smtp.gmail.com:465, timeout=300, options=array (
                   	                  )
2016-07-13 06:07:46	Connection: opened
2016-07-13 06:07:46	SMTP -> get_lines(): $data is ""
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "220 smtp.gmail.com ESMTP i34sm1346532otc.12 - gsmtp
                   	                  "
2016-07-13 06:07:46	SERVER -> CLIENT: 220 smtp.gmail.com ESMTP i34sm1346532otc.12 - gsmtp
2016-07-13 06:07:46	CLIENT -> SERVER: EHLO rewater.com
2016-07-13 06:07:46	SMTP -> get_lines(): $data is ""
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $data is "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250-SIZE 35882577
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $data is "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  250-SIZE 35882577
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250-8BITMIME
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $data is "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  250-SIZE 35882577
                   	                  250-8BITMIME
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $data is "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  250-SIZE 35882577
                   	                  250-8BITMIME
                   	                  250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250-ENHANCEDSTATUSCODES
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $data is "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  250-SIZE 35882577
                   	                  250-8BITMIME
                   	                  250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
                   	                  250-ENHANCEDSTATUSCODES
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250-PIPELINING
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $data is "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  250-SIZE 35882577
                   	                  250-8BITMIME
                   	                  250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
                   	                  250-ENHANCEDSTATUSCODES
                   	                  250-PIPELINING
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250-CHUNKING
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $data is "250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  250-SIZE 35882577
                   	                  250-8BITMIME
                   	                  250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
                   	                  250-ENHANCEDSTATUSCODES
                   	                  250-PIPELINING
                   	                  250-CHUNKING
                   	                  "
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "250 SMTPUTF8
                   	                  "
2016-07-13 06:07:46	SERVER -> CLIENT: 250-smtp.gmail.com at your service, [23.91.70.146]
                   	                  250-SIZE 35882577
                   	                  250-8BITMIME
                   	                  250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
                   	                  250-ENHANCEDSTATUSCODES
                   	                  250-PIPELINING
                   	                  250-CHUNKING
                   	                  250 SMTPUTF8
2016-07-13 06:07:46	Auth method requested: UNKNOWN
2016-07-13 06:07:46	Auth methods available on the server: LOGIN,PLAIN,XOAUTH2,PLAIN-CLIENTTOKEN,OAUTHBEARER,XOAUTH
2016-07-13 06:07:46	Auth method selected: LOGIN
2016-07-13 06:07:46	CLIENT -> SERVER: AUTH LOGIN
2016-07-13 06:07:46	SMTP -> get_lines(): $data is ""
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "334 VXNlcm5hbWU6
                   	                  "
2016-07-13 06:07:46	SERVER -> CLIENT: 334 VXNlcm5hbWU6
2016-07-13 06:07:46	CLIENT -> SERVER: cmV3YXRlcmluZ0BnbWFpbC5jb20=
2016-07-13 06:07:46	SMTP -> get_lines(): $data is ""
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "334 UGFzc3dvcmQ6
                   	                  "
2016-07-13 06:07:46	SERVER -> CLIENT: 334 UGFzc3dvcmQ6
2016-07-13 06:07:46	CLIENT -> SERVER: Z2FtbWF0cmlkZW50MTM=
2016-07-13 06:07:46	SMTP -> get_lines(): $data is ""
2016-07-13 06:07:46	SMTP -> get_lines(): $str is  "534-5.7.14

I’m not sure what to do to fix it.

https://wordpress.org/plugins/configure-smtp/