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email error


How to fix error “DKIM-Result: fail (bad signature)” and prevent mail bounce

DKIM-Result: fail (bad signature)” is an error reported by www.appmaildev.com – a DKIM validation website.

It means that the mail sender’s domain (say sender.com) failed an anti-spam test called DKIM, that is used to block fake or altered mails. (more…)

Error “Failed to authenticate on SMTP server with username” – Causes & fixes

Almost every PHP application relies on mail functions to send contact requests, newsletters, and more.

The most secure way to send these mails is to use SMTP authentication – that is, the PHP app uses a username and password to transfer mails to an SMTP server.

But this authentication can sometimes fail with the error:

Failed to authenticate on SMTP server with username "user@example.com" using XX possible authenticators

(more…)

Failed to connect to mailserver at – 5 causes & fixes for this PHP error

Here at Bobcares.com, we provide Outsourced Tech Support to web hosting providers. As part of our service, we resolve website errors posted by hosting users.

A common error we’ve seen in PHP applications is:

Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini

(more…)

MailBox quota exceeded email error – Top 5 causes, and how to fix it

Bobcares.com provides Outsourced Hosting Support to Web hosts and other hosting providers. Part of our services involve resolving technical support queries posted by hosting users.

A common support query posted by end users is – Emails bouncing with the error “550 MailBox quota exceeded“. (more…)

How to fix Amazon AWS EC2 Connection timed out error in SMTP

Here at Bobcares, we provide Server Administration and Maintenance services to AWS account owners.

An error we sometimes see in Amazon EC2 instances is : Connection timed out error in SMTP

This is usually caused due to various reasons such as mail server security restrictions, network routing issues or even port blocks at ISP or AWS levels.

(more…)

Top 5 reasons for ‘exim has failed’ error in cPanel servers and how to fix them

Top 5 reasons for ‘exim has failed’ error in cPanel servers and how to fix them

cPanel/WHM is the most commonly used control panel in hosting industry. In our role as outsourced hosting support specialists for web hosting companies, we resolve many errors related to the control panels.

Using the WHM, it is easy manage various services in the server, but there are many situations where these features fail or give errors, and expert intervention is required. (more…)

Fixing email error “435 Unable to authenticate at present” in cPanel, DirectAdmin, Ajenti and other Exim servers

Fixing email error “435 Unable to authenticate at present” in cPanel, DirectAdmin, Ajenti and other Exim servers

Bobcares.com provides outsourced hosting support to web hosts. As part of our services, we manage the tech support help desk of web hosts, and resolve issues posted by web hosting customers.

Many of our customers use Linux servers that run Exim as their mail server. Exim is usually present in web control panels such as Cpanel, DirectAdmin, Ajenti and more.

A common email error that we see in these servers is 435 Unable to authenticate at present. This is faced by email users when they try to send SMTP authenticated mail through the Exim server either through webmail (eg. Horde) or from an external mail service provider (Eg. Google’s Gmail). (more…)

Linux SMTP relay – How we protect your mail servers from being open relays

Linux SMTP relay – How we protect your mail servers from being open relays

Protecting mail servers from being used as Linux SMTP open relays, is a major security task we perform as a part of our Dedicated Tech Support services for web hosting providers.

An open mail relay is an SMTP server that allows any host to send mails through it. If it is open relay, users can send mails through that Linux SMTP relay server without authenticating.
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How to resolve ‘Outlook cannot connect to SMTP server’ error

How to resolve ‘Outlook cannot connect to SMTP server’ error

Often web hosts get contacted by account owners who are unable to send or receive emails via Outlook. The error message they see in their Outlook would be:

Task 'account@domain.com - 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)."

In our role as Website Support for web hosting companies, this is a concern we quickly resolve for users who have email accounts hosted in the customers’ servers.  (more…)

How to fix error “454 4.7.1 Relay access denied” in Postfix mail servers

How to fix error “454 4.7.1 Relay access denied” in Postfix mail servers

454 4.7.1 <user@domain.com>: Relay access denied

This is a commonly seen email failure error by web hosts, website owners and server owners who run Postfix mail server. 454 error usually happens while sending to and receiving from external domains.

In our role as Hosting Support Engineers for web hosting companies, we handle many such mail errors and fix them. Here, we’ll see what causes “454 4.7.1 Relay access denied” error and how we fix it. (more…)