- IPAGE EMAIL OUTLOOK ERROR 421 CANNOT CONNECT TO SMT FOR FREE
- IPAGE EMAIL OUTLOOK ERROR 421 CANNOT CONNECT TO SMT VERIFICATION
- IPAGE EMAIL OUTLOOK ERROR 421 CANNOT CONNECT TO SMT CODE
If the latter, what might we have done to cause this, and how might we alleviate it? To the best of my knowledge, we do not email in bulk. If they can repeat it from the server, then it would go to our Systems team to be handled.ģ.
– You can email the bounces to our Live Support department and they will check out the situation. If the former, then what might IMH do to alleviate this problem? If you are on a VPS or Dedicated, then it would be both.Ģ. – It is likely the former, particularly if you are on a shared server. Since AOL is bouncing based on our IP address, is this a function of IMH’s server’s IP, or our specific account? I would think the former. I will try to answer you questions as best I can:ġ. Recipients: 2 2 0 CN=Correo a Internet 2013,CN=Connections,CN=Exchange Routing Group (DWBGZMFD01QNBJR),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=*****,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=*****mty,DC=local 0 Last Error: 421 dalifep04.*****.net connection refused from Message Source Name: SMTP:Default VM-EXCHANGE Well, i try again and i have the same issue: 421 Unexpected failure, please try later.421 Too many concurrent SMTP connections please try again later.421 Server busy, try again later – psmtp.421 mx.aol.com Service unavailable – try again later.
IPAGE EMAIL OUTLOOK ERROR 421 CANNOT CONNECT TO SMT VERIFICATION
421 LDAP verification agent temporarily unavailable: Connection failed.421 Greylisting enabled, please try later.421 4.7.0 mx.aol.com Error: too many errors.421 #4.4.5 Too many connections to this host.421 #4.4.5 Too many connections from your host.421 4.4.2 mx.aol.com Error: timeout exceeded.
421 4.3.1 Out of disk space for temp file.Also, SMTP is a very slow protocol so using their HTTP interface will save you some server time.
IPAGE EMAIL OUTLOOK ERROR 421 CANNOT CONNECT TO SMT FOR FREE
With my ISP, automated messages always to go spam in googlemail for whatever reason.įor development, Mailgun offers a two hundred emails per day for free which should be enough in the beginning. Even if your mail server accepts the messages, it might hit a limit on another ISPs mail server because most ISPs have certain limits and email routing is quite complicated. If you're trying to use this for a production system, I can only suggest you use some service such as SendGrid or Mailgun. In general, sending emails is both art and science for some reason.
IPAGE EMAIL OUTLOOK ERROR 421 CANNOT CONNECT TO SMT CODE
As pointed out in the comments by others, there is typically also rate limiting by the ISP so you'll have to fine-tune your sending code to the ISPs expectations, which can be tedious. Some times after this error, I can't send any email (using this server) even from other applications like outlook express, I get error:Īlways make sure your sender address is also a valid mailbox so bounce messages actually get back to you, many ISPs prohibit use of other (unregistered) sender addresses entirely. Smtpclient.Credentials = new NetworkCredential(user, pass) Smtpclient.DeliveryMethod = SmtpDeliveryMethod.Network SmtpClient smtpclient = new SmtpClient(server, 25) //use this PORT! Mailmessage.Priority = MailPriority.Normal Mailmessage.From = new MailAddress(from, "From") every message is 50kb-80kb MailMessage mailmessage = new MailMessage() I send them one by one from a loop (as I build them). I am trying to send 4 emails using my isp.