Error 421 Too Many Concurrent Smtp Connections
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Guy, we highly recommend that you visit our Guide for New Members. Solved: Too many concurrent SMTP connections Discussion in 'Web & Email' started 421 too many concurrent smtp connections outlook by westone, Apr 20, 2012. Thread Status: Not open for further replies. Advertisement westone
421 Too Many Concurrent Smtp Connections Please Try Again Later
Thread Starter Joined: Jul 6, 2002 Messages: 211 Could anyone help me with this regular email error. It happens when I
Too Many Concurrent Smtp Connections Thunderbird
try to send an email. Usually it will clear itself eventually. The error message is: An unknown error has occurred. Account: 'pop3.blueyonder.co.uk (1)', Server: 'smtp.blueyonder.co.uk', Protocol: SMTP, Server Response: '421 know-smtpout-4.server.virginmedia.net: Too many concurrent
Too Many Concurrent Smtp Connections Outlook
SMTP connections; please try again later', Port: 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67 I don't understand what "Too many concurrent SMTP connections" means, or what I can do about it. Thanks for your help. Tech Support Guy System Info Utility version 1.0.0.2 OS Version: Microsoft Windows XP Professional, Service Pack 3, 32 bit Processor: Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz, x86 Family 6 Model 15 421 too many concurrent smtp connections cpanel Stepping 6 Processor Count: 2 RAM: 3070 Mb Graphics Card: NVIDIA GeForce 6200 LE, 512 Mb Hard Drives: C: Total - 232048 MB, Free - 166478 MB; D: Total - 6404 MB, Free - 1507 MB; Motherboard: ASUSTek Computer INC., Basswood Antivirus: BullGuard Antivirus, Updated: Yes, On-Demand Scanner: Enabled westone, Apr 20, 2012 #1 awamutu Joined: Apr 20, 2012 Messages: 4 i just called them earlier for help and got a solution!!! "An unknown error has occurred. Account: 'pop3.blueyonder.co.uk', Server: 'smtp.blueyonder.co.uk', Protocol: SMTP, Server Response: '421 know-smtpout-4.server.virginmedia.net: Too many concurrent SMTP connections; please try again later', Port: 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67" what it was is that the mail was going out on an old server so the man walked me through switching to the new server, for both sending and receiving and now, no problems! go to tools/ accounts/ mail tab/ click on your account and then properties/ servers/ make sure the incoming says pop3.virginmedia.com and the outgoing says smtp.virginmedia.com then change your account name to your email address and enter your password and then tick my server requires authentication/ apply/ settings/ tick log on using email and password (enter these)/ ok/ advanced tab/ tick both server require
Comments on Error 421: too many concurrent smtp connections Error 421: too many concurrent smtp connections4.71 (94.29%) 7 votesOn high traffic email servers you may see this kind of errors, it's very normal in some situations when your too many concurrent smtp connections outlook for mac users use lot of email. It basically means that there are a lot of smtp04.mailcore.me: too many concurrent smtp connections; please try again later. open SMTP connections (incoming and/or outgoing). The exact error message may be something like:421 Too many concurrent SMTP connections from this the server responded 421 too many concurrent s IP address; please try again later.How to fix Error 421 too many concurrent smtp connections?First we have to check out what's the smtp_accept_max value for our email server. In the case of cPanel servers, https://forums.techguy.org/threads/solved-too-many-concurrent-smtp-connections.1050076/ you just have to run a grep command against Exim configuration file, example:grep smtp_accept_max /etc/exim.confThen edit the variable and assign more simultaneous connections. Restart Exim to apply changes:service exim restartWhy does the Error 421 too many concurrent smtp connections happen? As we said, there are a number of valid reasons, but also it may indicate some kind of serious problem with your server.Valid reasons:Normal high traffic: in some times https://cpaneltips.com/error-421-too-many-concurrent-smtp-connections/ of the year like holidays, special dates like july 4th, christmas or new year.Newsletters: some of your users may be using massive newsletter and this can cause Exim to serve more connections than usual.Ilegitimate reasons:Coding errors: we've seen email loops in the code of webpages more than once, also con email client such as Outlook. This kind of behaviour can cause emails to be sent again and again, opening too many connections.Virus/Malware: malware and virus are uploaded to thousand of websites each day, causing damage in networks, companies and more. And one of the most common activities that crackers love is to use your email server as mail bomb server, to send tons of emails each day.Email hacking: if you are using weak passwords (like john123) on your email accounts they can be hacked easily using brute force attacks, and then used to send outgoing spam. Share on Twitter LinkedIn Google+ Email Facebook Exim Post navigation ← How to increase /tmp partition size on cPanel How to fix disk quotas on a cPanel server → cPanel Tips in your inboxSubscribe and get weekly cPanel & Linux server administration tutorials, tips & tricks Thank you for subscribingSomething went wrong.We respect your privacy. Topics:CentOS (8)CloudL
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links. You can target relevant areas of the site and show ads based on geographical location of the user if you wish. Starts at just $1 per CPM or $0.10 per CPC. 421 Too many concurrent SMTP connections; please try again later Discussion in 'Site & Server Administration' started by dwhswebhosting, Mar 7, 2009. 0 dwhswebhosting Active Member Messages: 91 Likes Received: 3 Best Answers: 0 Trophy Points: 78 #1 I have a linux server but seem to get too many smtp connections at once. Do you know how I can see who is connecting so much to my smtp so much? It's centos 4.5 linux host dwhs and it runs cpanel Here is the error: 421 Too many concurrent SMTP connections; please try again later dwhswebhosting, Mar 7, 2009 IP FreedomOverdose Peon Messages: 172 Likes Received: 4 Best Answers: 0 Trophy Points: 0 #2 do you use any firewalls? FreedomOverdose, Mar 7, 2009 IP flamer Peon Messages: 757 Likes Received: 16 Best Answers: 0 Trophy Points: 0 #3 ask your host to flush out all the connections made by your ip, there are over 21 connection attempts going on at a time, that is why this error appears up. flamer, Mar 7, 2009 IP (You must log in or sign up to reply here.) Show Ignored Content Log in with Facebook Your name or email address: Do you already have an account? No, create an account now. Yes, my password is: Forgot your password? Stay logged in Digital Point Home Forums > Development > Site & Server Administration > Log in to view your Analytics, AdSense & PayPal stats Home Forums Search Forums Recent Posts Spy Search EnginesGoogleAdSenseGuidelines / CompliancePlacement / Reviews / ExamplesReporting & StatsPaymentsAdWordsAnalyticsGoogle+SitemapsGoogle APIShoppingYahooPublisher NetworkSearch MarketingYahoo APIBingBing AdsAll Other Search EnginesDirectoriesSolicitations & AnnouncementsODP / DMOZBusiness & MarketingGeneral BusinessGeneral MarketingSearch Engine OptimizationKeywordsMicrodataPayment ProcessingPayPalSocial NetworksFacebookFacebook APITwitterGoogle+Link DevelopmentLegal IssuesDomain NamesAppraisalsCopywritingArticle MarketplaceeCommercePay Per Click AdvertisingDigital Point AdsGoogle AdWordsYahoo Search MarketingBing AdsAffiliate ProgramsAffiliate Progra