Email Sending Issues (14 Articles)

You may have exceeded the maximum number of connections to this server.

The default number of maximum allowed IMAP connections in Mozilla Thunderbird is set to 5. Depending on the specific IMAP configuration on the server hosting your account, this may result in the following error message: Unable to connect to your IMAP server. You may have exceeded the maximum number of connections to this server. If so, use the Advanced IMAP Server Settings dialog to reduce the number of cached connections. The solution is to reduce the maximum number of connections in Thunderbird. This can be done from Edit > Account Settings > Server Settings (under the mail account for which the setting should be modified) > Advanced > Maximum Number of server connections to cache .   Change the maximum number from 5 to 1 and the issue should be…

Error 553: Unable to verify address

When you receive a message saying "unable to verify address", please make sure that you have enabled the SMTP authentication option in your email client. Also, note that you have to use the full e-mail address for username. Example: you@yourdomain.com instead of you . For more information on how to set up your email client, you can refer to our tutorial: http://www.siteground.com/tutorials/email/…

Error 503: Valid RCPT command must precede DATA

The most common reason for this error is an incorrectly configured mail client. In order to solve this issue you should reconfigure your email client to successfully authenticate to the SMTP server. In Outlook, for example, this can be done by checking the " My server requires authentication " box in the Outgoing Server section of your mail options. For more information on how to set up your email client, you can refer to our tutorial: http://www.siteground.com/tutorials/email/ SiteGround provides the best email hosting environment and we will help you with any email questions/problems you may…

Error: Could not complete sender verify

This is a common issue which happens when using the cPanel username for authenticating on the smtp server. Please use the email username instead and this issue will be resolved. For more information please check our Mail tutorial: http://www.siteground.com/tutorials/email/index.htm…

My mobile device cannot send mails

This issue is usually caused by the fact that your mobile operator has filtered the outgoing smtp connections. In order to resolve this please contact your mobile operator and ask them how to use their smtp server.…

Error: Invalid HELO

The message "invalid HELO command" means that the application you are using for sending mails does not comply with corresponding RFC standards. This happens rarely and the only solution is to use another application for sending…

Error: ‘Too many recipients’

The "Too many recipients" error will be displayed when: an email message has more than 40 recipients; a domain tries to send more than 400 emails per hour (or 800 emails/hour if hosted on GoGeek plan). For more information, please look at our Terms of Use: http://www.siteground.com/terms.htm Unfortunately there are no exceptions to the above limitations and we are very strict in our anti-spam policies on the shared…

Error: ‘Retry time not reached for any host’

This error message means that a previous attempt to deliver the mail has failed with a temporary error, and the mail server computed the earliest time at which to try again. Please allow some more time and your message will be delivered. SiteGround provides the best email hosting environment and we can assist you with any email problems you may…

I receive Unroutable address bounce back error message.

The error " Unroutable address / Unroutable mail domain " is a general error which can be caused by several things:     a misspelled email address; for example, you have sent the mail to friend@sitegrond.com instead of friend@sitegroUnd.com ; please check very carefully the spelling of the email address of your recipient and try sending the message again ;     you have exceeded the maximum number of e-mails allowed to be sent out per hour; in this case you should allow some time for the number of sent messages to be reduced and then resend the mail ;     the mail server cannot determine the correct route for sending your email message because of a DNS configuration error with the recipient's MX records; in this case the support for the remote server should be contacted for additional assistance     SiteGround provides the best email hosting and our support team will help you with any email questions/problems you have. …

Cannot send email using TheBat

The most common reasons not to be able to send emails are: * Wrong TheBat settings; * Blocked port 25 by the Internet Service provider. To resolve the problem please try to: 1. Make sure you are using the correct TheBat settings: * Incoming mail server (POP3/IMAP server): mail.yourdomain.com * Outgoing mail server (SMTP server): mail.yourdomain.com * Username: the full e-mail address like email@yourdomain.com * SMTP authentication must be enabled for the login to be successful. IMPORTANT: Please do not use secure authentication to your mail server. A common mistake is to leave My SMTP server requires authentication checkbox unchecked. This option should be always enabled, since SiteGround servers require such authentication. 2. Try using the alternative TCP port 2525 for the smtp server. For more information check this URL: http://www.magicwinmail.net/client/thebat.asp…

Cannot send emails using Mozilla Thunderbird

The most common reasons not to be able to send emails are: * Incorrect Thunderbird settings; * Blocked port 25 by the Internet Service provider. To resolve the problem you should try to: 1. Make sure you are using the correct Thunderbird settings: * Incoming mail server (POP3/IMAP server): mail.yourdomain.com * Outgoing mail server (SMTP server): mail.yourdomain.com * Username: the full e-mail address like email@yourdomain.com * SMTP authentication must be enabled for the login to be successful. A common mistake is to leave " My SMTP server requires authentication checkbox " unchecked. This option should be always enabled, since SiteGround servers require such authentication. 2. Try using the alternative TCP port 2525 for the SMTP server. For more information you can check our Thunderbird tutorial . If you are having problems with your email, you may contact your host for assistance. SiteGround provides the best email hosting and we will assist you with any email issues you may…

Cannot send email using Eudora

The most common reasons not to be able to send emails are: * Wrong Eudora settings; * Blocked port 25 by the Internet Service provider. To resolve the problem please try to: 1. Make sure you are using the correct Eudora settings: * Incoming mail server (POP3/IMAP server): mail.yourdomain.com * Outgoing mail server (SMTP server): mail.yourdomain.com * Username: the full e-mail address like email@yourdomain.com * SMTP authentication must be enabled for the login to be successful. IMPORTANT: Please do not use secure authentication to your mail server. A common mistake is to leave My SMTP server requires authentication checkbox unchecked. This option should be always enabled, since SiteGround servers require such authentication. 2. Try using the alternative TCP port 2525 for the smtp server. For more information check this URL: http://help.websiteos.com/webmail/configure_eudora.htm…

Cannot send emails using Outlook Express

The most common reasons for not being able to send emails through Outlook Express are wrong Outlook settings or blocked port 25 by the Internet Service provider. Use the correct Mail Client settings: Incoming mail server (POP3/IMAP server): mail.yourdomain.com Outgoing mail server (SMTP server): mail.yourdomain.com Username: the full e-mail address like email@yourdomain.com SMTP authentication must be enabled for the login to be successful. The most common mistake is to leave " My SMTP server requires authentication checkbox " unchecked. This option should always be enabled, since SiteGround servers require such authentication. Please find below how to enable the SMTP authentication for your Outlook express mail client: From the Tools menu select Accounts . The Internet Accounts box appears. Select the Mail tab . Your email account appears. Select the appropriate email account by clicking on its name and click the Properties button on the right. Then under the Outgoing Mail Server section check the box My server requires authentication . Do NOT check the box next to Log on using Secure Password Authentication. Check connection to port 25 The standard port usually used for SMTP connection is port 25. Most often the reason for failed email sending is that your Internet service provider blocks this port. If this is the case we recommend that you use the alternative port 2525 for your email SMTP connection. If you are having problems with your email, you may ask your host for assistance. SiteGround provides the best email hosting and we will assist you with any email issues you may…

Cannot send emails using Outlook

The most common reasons for not being able to send emails through Outlook are wrong Outlook settings or blocked port 25 by the Internet Service provider. Here are a few checks you can make to ensure the problem is not on your end: Use the correct Mail Client settings: Incoming mail server (POP3/IMAP server): mail.yourdomain.com Outgoing mail server (SMTP server): mail.yourdomain.com Username: the full e-mail address like email@yourdomain.com SMTP authentication must be enabled for the login to be successful. IMPORTANT: Please do not use secure authentication to your mail server. The most common mistake is to leave My SMTP server requires authentication checkbox unchecked. This option should always be enabled since most mail servers require such authentication. In our Email tutorial you can find detailed instructions on how to configure your Outlook to work with your web hosting account. Check connection to port 25 The standard port used for SMTP connection is port 25. Most often the reason for failed email sending is that your Internet service provider blocks this port. If this is the case we recommend that you use the alternative port 2525 for your email SMTP connection. If you are having problems with your email, you may ask your host for assistance. SiteGround provides the best email hosting and we will assist you with any email sending issues you may…