Send email fails

0 votes

I try to submit an email, using UploadMessage, with many attachments (total size approx. 19MB) and I jump an error:

"Unable to write data to the transport connection: An error occurred during connection attempt because the connected party did not properly respond after a period of time, or failed to established connection and connected host has failed to respond."

You know that it can be? The mail then you are on gmail.

by
retagged by

1 Answer

0 votes
 
Best answer

  1. Uploading email to an IMAP server is a different thing than sending email. You should use SMTP server if you want to send an email.

  2. I don’t know how your code looks like, you might have simply reached Gmail’s 25MB message limit. Typically Base64 encoding makes the size of the files grow slightly 19 * 1.33 = 25.27

In fact I was able to upload 10MB, 15MB, 18 MB and 19MB messages.

With 19MB Gmail randomly disconnected without any error message. Seems it is Gmail's bug.

by (301k points)
...