Typical replies will be SMTP Error 101, Error opening connection or SMTP Error 101, cannot open SMTP stream. of 9Ģ 101 Cannot open connection SMTP Error 101 : Typically your SMTP server or program is unable to even start an SMTP session. Note : the following list of SMTP reply codes can also be used to troubleshoot Eudora or FoxMail problems, Outlook error codes, Outlook Express error codes (Windows 2000/XP), Windows Mail Error Codes (Vista), Thunderbird problems, or other program problems when those programs send and collect s directly to and from the Internet as opposed to through a corporate system. So, use this document as a quick reference to common SMTP status codes or SMTP error codes for SMTP mail servers such as AA Mail Server, Alt-N MDaemon, ArGoSoft Mail Server, Axigen Mail Server, Barracuda Spam Firewall, CMail, CMailServer, Anywhere, FTGate, GMS Mail, Internet Anywhere, Kerio MailServer (KMS), Lotus Notes, MailEnable, MailMax, Mailtraq, Merak Mail Server, Microsoft Exchange (Exchange Server 2003 NDR, Non-Delivery Report, error codes), Novell GroupWise, Qmail, PostCast Server, PostConf, PostFix, PowerMTA, QK SMTP Server, Rockliffe MailSite, SendMail, Surg, TFS Secure Message Server, VisNetic Mail Server, WinMail, Zimbra, or any other SMTP / ESMTP standards compliant MTA. It is just for such cases that we have produced this document (we use it too!! ). Depending on the actual problem it is encountering, your mail server may not be able to provide detailed help on how to resolve the problem, and may instead only be able to provide you with an SMTP Status Code in your server s log (these codes are also known as SMTP Error Codes or SMTP Reply Codes). After checking the usual suspects such as lack of connection (your broadband line is dead), faulty router, firewall problems, DNS problems, or an incorrect SMTP server name (thanks to some clever ISP changing its SMTP server name without informing anyone it happens!!), you will likely start delving a little deeper by checking if your server reports any errors.
Sometimes these problems will be with the interfacing of the mail server with the ISP, in particular an inability to send mail. 1 & SMTP Error Codes Reference There comes a time in the life of a Computer Consultant where, one day, he/she will have to deal with server problems.
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