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Mail server Blogs


cPanel spam mitigation – How we fight spamming in cPanel servers

Spam mails are more than a mere nuisance for web hosts. When a server is spammed, valid mails get lost or delayed indefinitely in the pool of spam mails.

Equally panicky situation is outbound spamming from your server. Your mail server IP can easily get blacklisted, causing email delivery failures for your customers.
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How to fix ‘SMTP AUTH is required for message submission on port 587’ error in cPanel/WHM servers

Mail servers have an SMTP authentication feature enabled in them, to validate users who try to send mails through that server.

The ‘SMTP AUTH’ error usually happens when users try to send mails without properly authenticating their mail account in email clients such as Outlook or Thunderbird. (more…)

Email blacklist removal – How to stay off blacklists for uninterrupted mail service

Email blacklist removal – How to stay off blacklists for uninterrupted mail service

Getting listed in a spam blacklist is a dreadful experience for server owners. Users end up facing email delivery failures and bounces, which can take your business reputation for a toss.

As a security measure, mail from blacklisted IPs are rejected by most mail servers. So, if you want uninterrupted mail services, you’ll need to stay clear of blacklists.

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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.

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MailEnable webmail folders and messages not showing – How to fix it?

MailEnable webmail folders and messages not showing – How to fix it?

Emails form an indispensable part of a hosting account. In our role as Outsourced server support specialists for web hosts, we encounter and resolve many email server issues in both Linux and Windows servers.

Wrong configuration paths, registry errors, lack of synchronization, folder subscription problems, binary corruptions, anything can lead to webmail related issues in Windows servers. (more…)

How to fix clamav update database error

How to fix clamav update database error

In our role as Outsourced server support specialists for web hosts, we secure and maintain the servers from attacks and viruses. There are several tools that come in handy, for securing various services.

ClamAV is an open source email scanning program that has an antivirus engine for detecting trojans, viruses, malware & other malicious threats in emails. ClamAV is usually integrated along with popular mail servers such as Exim.

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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…)

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…)

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