This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

change maximum number of emails to be sent

  • 1 reply
  • 1 has this problem
  • 216 views
  • Last reply by Toad-Hall

more options

Hello,

Our dental software (Novadent) has recently been changed linking now to Thunderbird email software. We used to send our next days patients listed a short reminder containing date and time of the appointment at the dentist. Using Thunderbird it seems we are limited to sending 15/16 emails . We would like to expand this limit to a max of 100. I have tried to send the patients listed their reminders in batches but it simply halts every outgoing mail.

How can we change these settings? It looks like its being treated as spam; which is not the case. Every mail contains specified usefull information regarding the patients appointment. Patients appreciate our reminders highly and have agreed to receival.

Awaiting your possible solution,

Regards,


assistent

Tandartspraktijk Hortusbuurt

- Groningen - NL
Hello, Our dental software (Novadent) has recently been changed linking now to Thunderbird email software. We used to send our next days patients listed a short reminder containing date and time of the appointment at the dentist. Using Thunderbird it seems we are limited to sending 15/16 emails . We would like to expand this limit to a max of 100. I have tried to send the patients listed their reminders in batches but it simply halts every outgoing mail. How can we change these settings? It looks like its being treated as spam; which is not the case. Every mail contains specified usefull information regarding the patients appointment. Patients appreciate our reminders highly and have agreed to receival. Awaiting your possible solution, Regards, assistent Tandartspraktijk Hortusbuurt - Groningen - NL

Chosen solution

Thunderbird does not limit how many emails you can send. It is just a program on your computer. However, your email provider can place limitations on number of emails sent via their server. This may be number of emails in any given period eg: per hour or in any 24 hour period. Or perhaps they have a limit on size/bandwidth.


There appears to be a limit of approximately 60 addresses when sending messages if you manually enter each address separately. However, if you use lists (mail distribution lists) for most of the addresses any limit is imposed by whatever SMTP server you use. This is usually the case if you are sending one email to several email addresses and emails are sent uisng Bcc. You can receive messages sent to multiple addresses in the same mailbox. Any limitations would be due to your e-mail provider.

If you are looking for a way of sending a more personalised email to several people you can use 'Mail Merge' addon. This uses the 'To' field and sends one email to each individual email address. You create a template email in Thunderbird, Mail Merge hooks that template up with eg: .csv file to insert personalised data held in Column headers. You can have them send using 'Send Later' option to put them in the 'Outbox' so they can be double checked before sending. https://addons.thunderbird.net/en-US/thunderbird/addon/mail-merge/


It would be useful to check what other software is being used, such as Anti-Virus scanning of outgoing mail as it may be slowing down the process.

Are the emails completed created in Thunderbird using templates etc or are you using other software like MS Office 'Mailto' process/ Send to mail recipient which then uses Thunderbird?

What version of Thunderbird are you using? Is it 52.9.1 or 60 or another ?

Read this answer in context 👍 0

All Replies (1)

more options

Chosen Solution

Thunderbird does not limit how many emails you can send. It is just a program on your computer. However, your email provider can place limitations on number of emails sent via their server. This may be number of emails in any given period eg: per hour or in any 24 hour period. Or perhaps they have a limit on size/bandwidth.


There appears to be a limit of approximately 60 addresses when sending messages if you manually enter each address separately. However, if you use lists (mail distribution lists) for most of the addresses any limit is imposed by whatever SMTP server you use. This is usually the case if you are sending one email to several email addresses and emails are sent uisng Bcc. You can receive messages sent to multiple addresses in the same mailbox. Any limitations would be due to your e-mail provider.

If you are looking for a way of sending a more personalised email to several people you can use 'Mail Merge' addon. This uses the 'To' field and sends one email to each individual email address. You create a template email in Thunderbird, Mail Merge hooks that template up with eg: .csv file to insert personalised data held in Column headers. You can have them send using 'Send Later' option to put them in the 'Outbox' so they can be double checked before sending. https://addons.thunderbird.net/en-US/thunderbird/addon/mail-merge/


It would be useful to check what other software is being used, such as Anti-Virus scanning of outgoing mail as it may be slowing down the process.

Are the emails completed created in Thunderbird using templates etc or are you using other software like MS Office 'Mailto' process/ Send to mail recipient which then uses Thunderbird?

What version of Thunderbird are you using? Is it 52.9.1 or 60 or another ?