Overview

joomla support cheshire manchester merseyside north west ukFrom time to time you may experience problems when trying to send email.

These problems will usually be caused by a fault on your device's email client software, a fault on the server or a breakdown in transmission during transit.

When a fault occurs you will usually see an SMTP error message return code.

This article attempts to explain the meaning of the most common error messages return codes.

And how to resolve the resulting problem.

See the links above.

 

A more complete list of Error Message Return Codes

Here is a link to a more complete list.

The author describes these messages in slightly different terms (but we are talking about the same thing).

Read more: A more complete list of Return Codes.

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Error 452: Too many Recipients

OR Message count quota exceeded.

This means that you are trying to send email to too many recipients in a given time period.

Web hosting companies usually set limits for how much email can be sent via the server in any one time period.

The web hosting company we use sets the following Email Traffic limits:

  • Email sending limit per Minute = 15.
  • Email sending limit per Hour = 150.

Note

The above figures refer to the total number of emails which may be sent (whether TO, CC or BCC) in the stated time period.

1 recipient = 1 email.

So if you were to send 1 email TO yourself and BCC to 149 other recipients then that would be the same as sending 150 separate emails.

Mailing lists are designed for use on a small scale.

If you want to send lots of bulk email then we recommend you use a bulk mailing service (example: MailChimp).

SOLUTION

Avoid breaching the limits set by your web hosting company when sending email.

 


Error 503: Valid RCPT command must precede DATA

There could unfortunately be a many causes of this error message.

 

SOLUTION

Note: it is a case of working through the possible causes and solutions listed below and then attempting to re-send your email message.

Apostrophes

Remove any apostrophes (single quotes) or other non-alphabetic characters from your email account name(s).

VPN

If your system is trying to connect via a VPN network while you're sending email, you may get this error. Try disconnecting the VPN before sending/ receiving mail.

Full mailbox

Make sure the mailbox of the affected account is not full or has met/ exceeded its quota. You can uncheck the following option to make sure a copy of all your emails is not being left on the server (note that since the email will be downloaded to your PC after this setting change, you won't be able to access your emails from another location if you do this). In Outlook, browse to Tools > Account Setting > More settings > Advanced > uncheck "leave a copy of this message on the server."

SMTP port

Use port 26 (instead of the default 25) for outgoing mail.

Server authentication

Set up your outgoing mail to use outgoing server authentication (sends mail by logging in with your email address and password). In Outlook, browse to Tools > Account Settings > More settings > Advanced and change the outgoing server to 'Auto.' Next, browse back to More settings > Outgoing server and check the "My outgoing server uses the same authentication as my incoming server" box. If you select to have Outlook "remember your password" you won't have to type it in every time you send an email.

Sender matching

Make sure you are sending from the same email address that the recipient sees your email coming in as (ie. don't make the "from" field differ from the email address used in your outgoing mail settings).

Outlook PST files

If you are using Outlook, sometimes the 503 error will occur if you have a corrupt outlook PST (mail archive) file. Try repairing the file.

Source: www.werockyourweb.com.

 


Error 550

550: Please try again later

Error 550 usually define a non-existent email address on the remote side (at the receiving end).

The vast majority of Error 550 messages are simply telling you that the recipient's email address doesn't exist.

Check you are using the correct email address.

It could instead be the case that their server is down.

Try sending again at a different time.

 

550: Please turn authentication on

550: Relay not permitted

If you try to send an email and see this error message, it means that your email client is not configured to authenticate with our outgoing mail servers.

When your email client settings are changed (see below) you will stop receiving the error message and you should be able to send mail.

In our experience, it is users  of the Outlook email client who usually experience this kind of error.

Outlook users should follow the steps below to resolve this problem.

This guidance may also enable non-Outlook users.

 

SOLUTION

If the email client are using is Outlook then please check that the following email account settings are as indicated below:

  1. Select More Settings in the bottom right of the window.
  2. Select Outgoing Server tab at the top.
  3. Select the box labelled My outgoing server (SMTP) requires authentication.

These steps are the same for Outlook 2003, 2007 and 2010. 

 


Error 550

550: IP in XBL

550: IP in SBL

550: IP in PBL

If the error message contains any of the above return codes when trying to send email, then it would appear to be that your outgoing mail is being blocked by the Spamhaus Blocklist.

Reason: suspected spam activity associated with the IP address from which mail is being sent.

This IP address could be either:

  1. the IP of your location, or
  2. the IP of the mail server used by your hosting account.

 

Follow these steps:

  1. Make a note of the IP address in the bounce back error message.
  2. Look up the IP address of your location at: http://whatismyip.com.
  3. If the IP address in (1) and (2) is the same then it is the IP you are sending from that is being blocked.
  4. Follow the instructions in the bounce back error message to unblock your IP address, and prevent recurrence of the block.
  5. If the IP address in (1) and (2) is not the same then this will indicate that it is the IP address of the mail server which is being blocked rather than the IP you are sending from.

 

Check the Block Lists

There are a wide range of resources you can use.

We like this one: MXtoolbox.com.

You could also try using the Spamhaus Blocklist Removal Centre at: http://www.spamhaus.org/lookup/.

Others include:

http://whatismyipaddress.com/blacklist-check,

http://www.dnsqueries.com/en/check_banned_ip.php.

 

IP you are sending from

If your IP appears in the Spamhaus Blocklist then either your computer, a previous computer or another computer using the same IP address, may have been infected by a trojan or virus or other malware.

To be on the safe side we recommend that you perform a FULL anti-malware and anti-malware scan of all computers in your location and check that your firewall is active and up to date.

Once you're sure your computer is clean, you can seek to have your IP removed from the blacklist.

If however your computer is still infected, you will be relisted very quickly, and your IP blocked again.

 

What is an IP Address?

The dynamic address used to identify your computer on the internet.

 


Error 550

550: IP in SCBL

550: IP in RBL

If the error message contains any of the above return codes when trying to send email, it would appear to be that your outgoing mail is being blocked by the SpamCop Blocking List.

Reason: suspected spam activity associated with the IP address from which mail is being sent.

This IP address could be either:

  1. the IP of your location, or
  2. the IP of the mail server used by your hosting account.

 

Follow these steps

  1. Make a note of the IP address in the bounce back error message.
  2. Look up the IP address of your location at: http://whatismyip.com.
  3. If the IP address in (1) and (2) is the same then it is the IP you are sending from that is being blocked.
  4. Follow the instructions in the bounce back error message to unblock your IP address, and prevent recurrence of the block.
  5. If the IP address in (1) and (2) is not the same then this will indicate that it is the IP address of the mail server which is being blocked rather than the IP you are sending from.

 

Check the Block Lists

There are a wide range of resources you can use.

We like this one: MXtoolbox.com.

You could also try using the Spamhaus Blocklist Removal Centre at: http://www.spamhaus.org/lookup/.

Others include:

http://whatismyipaddress.com/blacklist-check,

http://www.dnsqueries.com/en/check_banned_ip.php.

 

IP you are sending from

If the IP you are sending from appears in this blocklist then either your computer, a previous computer or another computer using the same IP address, may have been infected by a trojan or virus or other malware.

To be on the safe side we recommend that you perform a FULL anti-malware and anti-malware scan of all computers in your location and check that your firewall is active and up to date.

Once you're sure your computer is clean, you can seek to have your IP removed from the blacklist.

If however your computer is still infected, you will be relisted very quickly, and your IP blocked again.

 

What is an IP Address?

The dynamic address used to identify your computer on the internet.

 


Error 554: MTA Reputation

554 Your access to this mail system has been rejected due to the sending MTA's IP

If you receive the above (or similar) error message followed by an IP address, you should contact your web hosting company.

Send their technical support the complete error message (inlcuding the MTA's IP).

Solution

The hosting company should then request the de-listing of the affected mail server but this can take some time.

In the meantime, they should advise you of the details of an alternative mail server to use.

This will necessitate changing your outgoing mail server settings in your email client (for example, Outlook).

 


Outlook Error Codes

Outlook users sometimes report having difficulty either sending or receiving email.

The most common error we come across is this one.

Error Code 0x80042108

'The operation timed out waiting for a response from the sending (smtp) server.'

There could be any number of reasons for why this error message is created.

See the following link.

Read more: Fix Outlook Error 0x80042108 while sending emails.

QUICK FIX

In the first instance, try this simple FIX which has worked for more than one of our customers.

Turn your router:

  • OFF for a couple of minutes,
  • then back ON again.