How To Fix Smtp Error 421
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Smtp Error 421 Service Not Available
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421 Downstream Server Error
site, you are agreeing to our use of cookies. Learn More. 421 SMTP Server error: too many concurrent sessions, please try again later. Discussion in 'E-mail Discussions' started by Jeff75, Jul 5, 2006. Jeff75 Well-Known Member Joined: Apr 11, 2003 Messages: 555 Likes Received: 0 Trophy Points: 16 Does anyone know what would cause this error "421 SMTP Server error: too many concurrent sessions, please try again later.? smtp error (421) connection to server failed Any idea how to fix it? I tried restarting the mail server but it keeps coming up from time to time for a certain user when he sends mail. #1 Jeff75, Jul 5, 2006 webignition Well-Known Member Joined: Jan 22, 2005 Messages: 1,880 Likes Received: 0 Trophy Points: 36 Jeff75 said: 421 SMTP Server error: too many concurrent sessions, please try again later.Click to expand... This error seems rather self-explanatory - connections to the SMTP server are being rejected due to there already being X number of connections from the same IP. Have you investigated the case that the user simply has too many open connections to the SMTP server? Jon Cram
Forums Hosting Security and Technology How to fix Exim error? -- 421 too many messages in this connection If this is your first visit, be sure to check out smtp 421 4.3.2 service not available the FAQ by clicking the link above. You may have to register before you error 421 http can post: click the register link above to proceed. To start viewing messages, select the forum that you want to refused to talk to me: 421 downstream server error visit from the selection below. Results 1 to 10 of 10 Thread: How to fix Exim error? -- 421 too many messages in this connection Tweet Thread Tools Show Printable Version Subscribe to this https://forums.cpanel.net/threads/421-smtp-server-error-too-many-concurrent-sessions-please-try-again-later.54893/ Thread… Search Thread Advanced Search Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 08-16-2013,05:45 PM #1 mrzippy View Profile View Forum Posts View Forum Threads Visit Homepage Mr. Awesome Join Date Jul 2002 Posts 6,103 How to fix Exim error? -- 421 too many messages in this connection Hello, We have a client who is receiving this error when they try to send http://www.webhostingtalk.com/showthread.php?t=1295054 mail over port 587 using TLS. (No error is seen when sending over port 25 or 26.) 421 too many messages in this connection Does anyone know what might be the cause or solution? The server is running standard cpanel software and has 12gb of RAM. Thanks. Want to sell domain names? Sign up today for an eNom.com reseller account from a trusted eNom ETP provider. * We provide support and service to over 3245 happy eNom domain name and SSL certificate resellers! Reply With Quote 0 08-16-2013,05:59 PM #2 Vernard View Profile View Forum Posts View Forum Threads WHT Addict Join Date Mar 2013 Location Texas, USA Posts 173 What's your max email per hour setting set to in WHM? Also, have you checked your exim configuration file for smtp max? Reply With Quote 0 08-16-2013,06:08 PM #3 mrzippy View Profile View Forum Posts View Forum Threads Visit Homepage Mr. Awesome Join Date Jul 2002 Posts 6,103 Originally Posted by Vernard What's your max email per hour setting set to in WHM? Also, have you checked your exim configuration file for smtp max? Hello, The "Maximum Hourly Email by Domain Relayed" in the account's cpanel is
Suite Administrator HelpG Suite AdministratorHelp forumForum Contact us Service issues (Gmail, Calendar, etc)GmailBounced and Delayed Messages GoogleApps is now G Suite. Same service, new name. More about the name change. SMTP Error ReferenceTo help identify the source of errors, Gmail adds "gsmtp" to all errors it generates. Gmail also https://support.google.com/a/answer/3726730?hl=en adds "-gdcp" to custom errors generated from PVC policies, such as Default Routing rules.For example: "550 5.7.1 This messageviolatesexample.comemail policy. - gcdp