Title: Server Closes Connection Unexpectedly Last modified: September 20, 2017 --- # Server Closes Connection Unexpectedly * Resolved [andaluzmedia](https://wordpress.org/support/users/andaluzmedia/) * (@andaluzmedia) * [8 years, 8 months ago](https://wordpress.org/support/topic/server-closes-connection-unexpectedly/) * Hi Support, * Thanks for the free plugin. * I am currently experiencing a strange issue where the server is closing the connection prior to any mail being sent. There appears to be no verification issue, or readable errors that I can see. It’s very strange indeed. * ** Server Info: OS: Linux srv2200.local.ltd 2.6.32-504.30.3.el6.x86_64 #1 SMP Wed Jul 15 10:13:09 UTC 2015 x86_64 PHP version: 5.6.31 WordPress version: 4.8.2 WordPress multisite: Yes openssl: Available allow_url_fopen: Enabled stream_socket_client: Available fsockopen: Available cURL: Available cURL Version: 7.38.0, OpenSSL/ 1.0.1e * **Output from test email:** (I have replaced our server IP and domain with placeholders) * 2017-09-20 14:32:05 Connection: opening to ssl://smtp.gmail.com:465, timeout= 300, options=array ( ‘ssl’ => array ( ‘verify_peer’ => false, ‘verify_peer_name’ => false, ‘allow_self_signed’ => true, ),) 2017-09-20 14:32:05 Connection: opened 2017-09-20 14:32:05 SMTP -> get_lines(): $data is “” 2017-09-20 14:32:05 SMTP- > get_lines(): $str is “220 smtp.gmail.com ESMTP t4sm941993edc.42 – gsmtp” 2017- 09-20 14:32:05 SERVER -> CLIENT: 220 smtp.gmail.com ESMTP t4sm941993edc.42 – gsmtp 2017-09-20 14:32:05 CLIENT -> SERVER: EHLO mydomain.com 2017-09-20 14:32: 05 SMTP -> get_lines(): $data is “” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “250-smtp.gmail.com at your service, [1.2.3.4]” 2017-09-20 14:32:05 SMTP- > get_lines(): $data is “250-smtp.gmail.com at your service, [1.2.3.4]” 2017- 09-20 14:32:05 SMTP -> get_lines(): $str is “250-SIZE 35882577” 2017-09-20 14: 32:05 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [1.2.3.4] 250-SIZE 35882577” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “250-8BITMIME” 2017-09-20 14:32:05 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [1.2.3.4]250-SIZE 35882577250-8BITMIME” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH” 2017-09-20 14:32:05 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [1.2.3.4]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “250-ENHANCEDSTATUSCODES” 2017-09-20 14:32:05 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [1.2.3.4]250-SIZE 35882577250-8BITMIME250- AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “250-PIPELINING” 2017-09-20 14:32:05 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [ 1.2.3.4]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “250-CHUNKING” 2017-09-20 14:32:05 SMTP -> get_lines(): $data is “250-smtp.gmail.com at your service, [1.2.3.4]250-SIZE 35882577250-8BITMIME250- AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250- PIPELINING250-CHUNKING” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “250 SMTPUTF8” 2017-09-20 14:32:05 SERVER -> CLIENT: 250-smtp.gmail.com at your service,[ 1.2.3.4]250-SIZE 35882577250-8BITMIME250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH250-ENHANCEDSTATUSCODES250-PIPELINING250-CHUNKING250 SMTPUTF8 2017-09-20 14:32:05 Auth method requested: XOAUTH2 2017-09-20 14:32:05 Auth methods available on the server: LOGIN,PLAIN,XOAUTH2,PLAIN-CLIENTTOKEN,OAUTHBEARER,XOAUTH 2017-09-20 14:32:05 CLIENT -> SERVER: QUIT 2017-09-20 14:32:05 SMTP -> get_lines(): $data is “” 2017-09-20 14:32:05 SMTP -> get_lines(): $str is “221 2.0.0 closing connection t4sm941993edc.42 – gsmtp” 2017-09-20 14:32:05 SERVER -> CLIENT: 221 2.0.0 closing connection t4sm941993edc.42 – gsmtp 2017-09-20 14:32:05 Connection: closed * I have tried both SSL and TLS, also revoking + reauthenticating the permissions. * Please advise – thanks. Viewing 4 replies - 1 through 4 (of 4 total) * Plugin Author [Noor Alam](https://wordpress.org/support/users/naa986/) * (@naa986) * [8 years, 8 months ago](https://wordpress.org/support/topic/server-closes-connection-unexpectedly/#post-9515800) * Hi, It’s hard to troubleshoot this since there is no error in the log. Have you tried TLS on port 587? Who is your hosting provider? * Thread Starter [andaluzmedia](https://wordpress.org/support/users/andaluzmedia/) * (@andaluzmedia) * [8 years, 8 months ago](https://wordpress.org/support/topic/server-closes-connection-unexpectedly/#post-9516259) * Hi there, * Yes I used TLS as default due to it being the newer technology, and only tested SSL out of pure curiosity. * I appear to have the identical problem to the guy in the other support thread who has posted earlier today, as it closes the connection without any explanation/ error. * Hopefully we can find a resolution. * Thread Starter [andaluzmedia](https://wordpress.org/support/users/andaluzmedia/) * (@andaluzmedia) * [8 years, 8 months ago](https://wordpress.org/support/topic/server-closes-connection-unexpectedly/#post-9516467) * We’re using a dedicated server with the ISP NForce. * Plugin Author [Noor Alam](https://wordpress.org/support/users/naa986/) * (@naa986) * [8 years, 7 months ago](https://wordpress.org/support/topic/server-closes-connection-unexpectedly/#post-9530123) * [https://wordpress.org/support/topic/refresh-token-bug-i-will-rate-you-5-stars-if-fixed/](https://wordpress.org/support/topic/refresh-token-bug-i-will-rate-you-5-stars-if-fixed/) * If you continue to have this issue you can downgrade to version 1.1.2 before the Google API Client library got updated in the plugin: * [https://wordpress.org/plugins/gmail-smtp/advanced/](https://wordpress.org/plugins/gmail-smtp/advanced/) Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘Server Closes Connection Unexpectedly’ is closed to new replies. * ![](https://ps.w.org/gmail-smtp/assets/icon-128x128.png?rev=2432932) * [Gmail SMTP](https://wordpress.org/plugins/gmail-smtp/) * [Frequently Asked Questions](https://wordpress.org/plugins/gmail-smtp/#faq) * [Support Threads](https://wordpress.org/support/plugin/gmail-smtp/) * [Active Topics](https://wordpress.org/support/plugin/gmail-smtp/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/gmail-smtp/unresolved/) * [Reviews](https://wordpress.org/support/plugin/gmail-smtp/reviews/) * 4 replies * 2 participants * Last reply from: [Noor Alam](https://wordpress.org/support/users/naa986/) * Last activity: [8 years, 7 months ago](https://wordpress.org/support/topic/server-closes-connection-unexpectedly/#post-9530123) * Status: resolved