SMTP error from remote mail server after RCPT TO:<firstname.lastname@example.org>: host domain.com [xx.xx.xx.xx]:
550-Please turn on SMTP Authentication in your mail client.
550-(mail.server.net) [xxx.xxx.xxx.xxx]:36825 is not permitted to relay through
550 this server without authentication.
All popular mail servers have SMTP authentication enabled for security protection. Mail accounts using those servers need to authenticate first, before trying to send mails.
At times, users can try to send mails from their mail clients without enabling authentication. ‘550-Please turn on SMTP Authentication’ is a commonly reported error when users try to send mails without authenticating.
At Bobcares website support services, this is a common error we see in cPanel/WHM shared hosting servers. We’ve seen that strict anti-spam rules or lack of SMTP authentication usually cause this error.
The mail user reports the error:
Task email@example.com – Sending reported error (0x800CCC78): ‘Cannot send the
message. Verify the email address in your account properties. The server
responded: 550 Access denied – Invalid HELO name (See RFC2821 188.8.131.52)
Corresponding entry in Exim logs say:
2014-09-24 07:06:31 H=isp-ip-dom.net [xxx.xxx.xxx.xxx] rejected MAIL
<firstname.lastname@example.org>: Access denied - Invalid HELO name (See RFC2821 184.108.40.206) (more…)
Occasionally Odin Plesk customers report inability to send or receive emails reporting the following Outlook errors:
The host 'mail.domain.com' could not be found. Please verify that you have entered the server name correctly. Account: 'username', Server: 'mail.domain.com', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 11001, Error Number: 0x800CCC0D.
Your server has unexpectedly terminated the connection. Possible causes for this include server problems, network problems, or a long period of inactivity. Subject 'Test mail', Account: 'mail.mydomain.net', Server: 'mail.mydomain.net', Protocol: SMTP, Port: 25,
Secure(SSL): No, Socket Error: 10053, Error Number: 0x800CCC0F
One of the common category of mail issues are those that result from failed client-server connection. Here we’ll go through the reasons why this error is returned in cPanel servers, how to identify the issues, and how to resolve them. (more…)
Now almost every webmaster uses a mobile device to check and reply to their business mails, but the increased mobility presents an issue of mails going out of sync between the various devices they use.
Engineers in our help desk support team often receive requests to locate missing mails sent from mobile devices. This is mostly reported by iPhone and iPad users, and is caused by differing naming conventions for the “sent” mail folder in different mail clients.
SMTP error from remote mail server after RCPT TO:<email@example.com>:
host mx.server.com [xxx.xxx.xxx.xxx]: 550-Verification failed for <firstname.lastname@example.org>
550-The mail server could not deliver mail to email@example.com. The account ordomain may not exist, they may be blacklisted, or missing the proper dns entries.
550 Sender verify failed
If you are a Parallels Plesk web host, you would recognize this as one of the common errors reported by your customers.
Sender verify failed can be caused by issues ranging from improper file permissions to RFC non-compliance. Engineers at Bobcares help desk support services collect detailed information regarding the error through log analysis and engaging the customer. The following are the few of the common causes for this error. (more…)
Task ‘firstname.lastname@example.org – Sending’ reported error (0x80042109) : ‘Outlook cannot connect to your outgoing (SMTP) e-mail server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).’
If you are a cPanel/WHM web host, this would be a common error reported by your customers who use Outlook.
A one-size-fit-all solution is not possible for this error as the issue might be in the PC/Laptop, at the ISP or even at your server.
Help desk support services at Bobcares engage each web master on a step-by-step trouble shooting process, which determines exactly where the issue is, and solves the specific issue that caused the error. Here’s a quick run down on the various issues that can cause Outlook error 0x80042109. (more…)
At one time or another, every shared web hosting company has had to deal with email blacklisting issues. Hacked web sites, stolen/leaked account login details, or improperly configured mail servers allow hackers to send out thousands of spam, raising red flags in IP reputation monitors across the internet.
Bobcares help desk support services has helped web hosts prevent getting listed in spam blacklists through adopting industry best practices. In this post, a brief rundown is given on the top effective solutions to prevent IP blacklisting. (more…)