Attachments in Base64

[erva 2]

Hi,

 

Added these properties to TIdmessage:

 

mailMessage.ContentType := 'text/plain';
mailMessage.CharSet := 'UTF-8';

 

After that mail attachments shows in receivers mail as Base64 format in mail, no attached file is in mail like this:

 

"This is a multi-part message in MIME format

 

--sgPuwCmxSaiDhkWsCT2JPGRD=_YJcryGeg

Content-Type: text/plain; charset="UTF-8"

Content-Transfer-Encoding: quoted-printable

Content-Disposition: inline

 

T=C3=A4ss=C3=A4 on =C3=A4=C3=A4kk=C3=B6si=C3=A4 ja liite

 

--sgPuwCmxSaiDhkWsCT2JPGRD=_YJcryGeg

Content-Type: application/pdf;

                             name="1.pdf"

Content-Transfer-Encoding: base64

Content-Disposition: attachment;

                             filename="1.pdf"

 

JVBERi0xLjcNCiXi48/TDQoyIDAgb2JqDQo8PC9MZW5ndGggMjcxMi9GaWx0ZXIvRmxhdGVEZWNv

ZGU+Pg0Kc3RyZWFtDQp4Aa2aS4/sOhWF5yXVf8gvMH7mISGke+6D8YEjMUDMLiAhQDp3wt/nWzt2

utLd5Up3apB2ynHSy2uvvb39+H69fL1evre/OWSXyjJMi3dTHIeQJ5d9pHRhSsNvf79e/nK9/Pd6

+fLtevndL35Y3DKW4ds/rpe//m3ww6/Xi6fww2//vF7yPLsy8q3sljx849nvvU/F+zJzRe/zl7Us

gXvVUfpEm5HfmWee8sc/DN/+db38zD/8eoN0vU8TcIdp8m6e8xDC4nwpn0ObZjcXPlVc8A1sAGwA

kJW6B1AAWEg9UGEpbpzTkCExljyUxZU4fw5VjMkFfSq7PG2w4Cf8CBZBowzwGPIhSDCVQ3gKpCm7

MW6QMJ+YkfkE7TGkajo4ktDikt3s0z2SArZ1S5nvKK3abkmYvyGK2EliS4v3EZISghO6CNKE0HSp

TfyZ51x6bm31HFvrd/yJZ/pNe72r7+lbutKEULlGvqv3kv4HV6TO/gdGUpsxvmOYvbP86Y+4jZvK........."

 

If mail is not including attachment, it shows as it should  in receivers email app.

 

I need to chance some other properties also from TIdSMTP and/or TIdMessage but i don't have any idea what to change.

[erva 2]

Also these properties are in TIdmessage:

 

object mailMessage: TIdMessage
    AttachmentEncoding = 'UUE'
    Encoding = meDefault

[Remy Lebeau 1436]

11 hours ago, erva said:

Added these properties to TIdmessage:

 

mailMessage.ContentType := 'text/plain';
mailMessage.CharSet := 'UTF-8';

Those are the wrong settings to use when attachments are involved.  You should read the following articles on Indy's blog (just ignore the portions about HTML):

 

https://www.indyproject.org/2005/08/17/html-messages/

 

https://www.indyproject.org/2008/01/16/new-html-message-builder-class/

 

In your situation, you need to set the top-level ContentType to 'multipart/mixed' instead, and then add the plain text as a TIdText object in the TIdMessage.MessageParts collection, and the PDF as a TIdAttachmentFile object in the TIdMessage.MessageParts collection, for example:

IdMessage1.ContentType := 'multipart/mixed';

with TIdText.Create(IdMessage1.MessageParts, nil) do
begin
  ContentType := 'text/plain';
  CharSet := 'utf-8';
  Body.Text := 'Tässä on ääkkösiä ja liite';
end;

with TIdAttachmentFile.Create(IdMessage1.MessageParts, '<path to>\1.pdf') do
begin
  ContentType := 'application/pdf';
end;

The helper TIdMessageBuilderPlain class can set that up correctly for you, for example:

Builder := TIdMessageBuilderPlain.Create;
try
  Builder.PlainText.Text := 'Tässä on ääkkösiä ja liite';
  Builder.PlainTextCharSet := 'utf-8';
  Builder.Attachments.Add('<path to>\1.pdf').ContentType := 'application/pdf';
  Builder.FillMessage(IdMessage1);
finally
  Builder.Free;
end;

Quote

After that mail attachments shows in receivers mail as Base64 format in mail, no attached file is in mail

By setting the top-level ContentType to 'text/plain', you are telling email readers to interpret the email's entire content as just one big plain text document, rather than letting them parse the content for attachments, etc.

10 hours ago, erva said:

Also these properties are in TIdmessage:

 

object mailMessage: TIdMessage
    AttachmentEncoding = 'UUE'
    Encoding = meDefault

The default AttachmentEncoding is 'MIME', you should leave it at that.  UUE was popular way back in the days of Usenet groups, but nobody uses those anymore.  MIME is the dominant encoding used nowadays.

Edited November 11, 2022 by Remy Lebeau