As with most email clients, Thunderbird is also bound by email server constraints wherein attachments over 25 MB are typically blocked or do not send. However, when importing from a PST file, it is possible to retain large attachments with the correct strategy.
Manual way (limitations of large attachments)
If you utilize the manual moving method (Outlook + Thunderbird add-ons), those large attachments over 25 MB may:
Not move, or
Get corrupted or truncated in the move.
Manual moving methods do not manage large attachments in an efficient manner.
Technical way to Convert PST Attachments into Thunderbird
When using the Mailvita PST to MBOX Converter in Mac, you can manage oversized attachments without any issues. The tool ensures the following:
- No size limitation - attachments over 25 MB remain intact
- Full retention of email properties, inline images, and folder hierarchy
- Conversion of the PST to MBOX, something Thunderbird natively supports.
Instructions:
1. To begin, you will need to download PST to MBOX converter tool on your computer.
2. Afterwards, the next step is to select the PST file and Click on Browse Button so you can load the PST you wish to convert to MBOX.
3. Next, Select the destination folder in which to save the MBOX file and click on Browse Button.
4. Finally, press the "Convert" button to start the process of converting the PST File.
After doing the import process, Thunderbird will allow you to save large attachments but even then, when you send your attachment to your destination the server still has a limit of 25MB in size. In that case, Thunderbird is suggesting that you use FileLink (meaning cloud storage integration to the configuration) noticing that there is a way to integrate several service namely Dropbox , Google Drive, or OneDrive.
Manual way (limitations of large attachments)
If you utilize the manual moving method (Outlook + Thunderbird add-ons), those large attachments over 25 MB may:
Not move, or
Get corrupted or truncated in the move.
Manual moving methods do not manage large attachments in an efficient manner.
Technical way to Convert PST Attachments into Thunderbird
When using the Mailvita PST to MBOX Converter in Mac, you can manage oversized attachments without any issues. The tool ensures the following:
- No size limitation - attachments over 25 MB remain intact
- Full retention of email properties, inline images, and folder hierarchy
- Conversion of the PST to MBOX, something Thunderbird natively supports.
Instructions:
1. To begin, you will need to download PST to MBOX converter tool on your computer.
2. Afterwards, the next step is to select the PST file and Click on Browse Button so you can load the PST you wish to convert to MBOX.
3. Next, Select the destination folder in which to save the MBOX file and click on Browse Button.
4. Finally, press the "Convert" button to start the process of converting the PST File.
After doing the import process, Thunderbird will allow you to save large attachments but even then, when you send your attachment to your destination the server still has a limit of 25MB in size. In that case, Thunderbird is suggesting that you use FileLink (meaning cloud storage integration to the configuration) noticing that there is a way to integrate several service namely Dropbox , Google Drive, or OneDrive.