I have been using Tbird for years and have never seen this issue. I have a client that when she sends an email, usually with PDF attachments, the email goes to the recipient but what gets placed in her sent folder is the header followed with random characters. For example, this is what showed up in the sent email folder from a email sent with PDF attachment. This does not happen all the time but certainly happens enough for concern. Thanks in advance This is a multi-part message in MIME format. --------------DKw3Ng5FWCwo2gxva0GMlykR Content-Type: multipart/alternative; boundary="------------6yPWn8qg4so24DNS4Lj4FYis" --------------6yPWn8qg4so24DNS4Lj4FYis Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 R29vZCBtb3JuaW5nIEJlcmVuaWNlLA0KDQpQbGVhc2UgcHJpbnQgdGhlIGRvY3VtZW50IGF0 dGFjaGVkIGFuZCBzaWduIGl0IHR3aWNlICgqV2hlcmUgdGhlIHJlZCANCmFycm93cyBhcmUg aW4gdGhlIHBob3RvKiksIGF0IHRoZSByaWdodC1oYW5kIHNlY3Rpb24gd2hlcmUgaXQgc2F5 cyB5b3VyIA0KbmFtZSwgKCpQcmluY2lwYWwncyBBdXRob3JpemVkIFJlcHJlc2VudGF0aXZl KiksIGFuZCAqKFNpZ25hdHVyZSkgDQpBcHBsaWNhbnQqLg0KSGF2ZSBvbmUgd2l0bmVzcyAo dGhlIHBlcnNvbiB3aG8gb2JzZXJ2ZWQgeW91ciBzaWduaW5nKSBzaWduIHRoZSANCmRvY3Vt ZW50IGF0IHRoZSAqZmlyc3QgbGluZSogb24gdGhlIGxlZnQgKCpXaGVyZSB0aGUgZ3JlZW4g YXJyb3cgaXMgaW4gDQp0aGUgcGhvdG8gLSBJdCdzIGp1c3QgdGhlIHNpZ25hdHVyZSopLg0K DQpTZW5kIGl0IHRvIHVzIHJpZ2h0IGF3YXkgc28gd2UgY2FuIG1vdmUgZm9yd2FyZCB3aXRo IHRoZSBhcHBsaWNhdGlvbi4NCg0KUmVnYXJkcywNCg0KQVBJIExvZ28NCglQYXRyaWNpYSBH YWxsb3RhDQozNDE5IEdhbHQgT2NlYW4gRHJpdmUsIFN1aXRlIEENCkZvcnQgTGF1ZGVyZGFs ZSwgRkzCoCAzMzMwOA0KOTU0LjU2Ny4wMDEzIFggMjggLSBPZmZpY2UNCjk1NC41NjcuMzQw MSAtIEZheA0Kd3d3LmFwaXByb2Nlc3NpbmcuY29tDQoNCg0KU3BlY2lhbGl6aW5nIGluIEZs b3JpZGEgJiBPdXQtT2YtIFN0YXRlIExpY2Vuc2luZyBmb3IgRWxlY3RyaWNhbCwgQWxhcm0s IA0KRmlyZSwgTGltaXRlZCBFbmVyZ3kgYW5kIGFsbCBDb25zdHJ1Y3Rpb24gUmVsYXRlZCBM aWNlbnNlcy4NCg0KRG9tZXN0aWMgJiBGb3JlaWduIENvcnBvcmF0aW9ucyBpbmNsdWRpbmcg UmVnaXN0ZXJlZCBBZ2VudCBTZXJ2aWNlcw0KDQpfV2UgYXJlIHByb3VkIHRvIG9mZmVyIHRo ZSBmb2xsb3dpbmcgYWRkaXRpb25hbCBzZXJ2aWNlczpfDQoNCjE0IEhvdXIgUmVxdWlyZWQg Q29udGludWluZyBFZHVjYXRpb24gZm9yIENJTEIgRGl2aXNpb24gSSAmIERpdmlzaW9uIElJ IA0KbGljZW5zZXMgLSBvbiBsaW5lIGNvdXJzZQ0KDQoxNCBIb3VyIEZpbmFuY2lhbCBTdGFi aWxpdHkgQm9uZCBDb3Vyc2UNCg0KQWxsIHJlcXVpcmVkIHN0YXRlIGJvbmRzDQoNCnd3dy5h cGljb250aW51aW5nZWR1Y2F0aW9uLmNvIDxodHRwOi8vd3d3LmFwaWNvbnRpbnVpbmdlZHVj YXRpb24uY29tPm0gDQo8aHR0cDovL3d3dy5hcGljb250aW51aW5nZWR1Y2F0aW9uLmNvbT4N Cg0KDQoNCi0tLS0tLS0tIEZvcndhcmRlZCBNZXNzYWdlIC0tLS0tLS0tDQpTdWJqZWN0OiAJ SW5kZW1uaWZpY2F0aW9uIEFncmVlbWVudCAtIEJlcmVuaWNlIFZhenF1ZXoNCkRhdGU6IAlU dWUsIDI0IFNlcCAyMDI0IDEwOjA1OjQxIC0wNDAwDQpGcm9tOiAJUGF0cmljaWEgR2FsbG90 YSA8cGF0cmljaWFAYXBpcHJvY2Vzc2luZy5jb20+DQpUbzogCWluZm9AYmVyZW5pY2V2YXpx dWV6LmNvbQ0KDQoNCg0KR29vZCBtb3JuaW5nIEJlcmVuaWNlLA0KDQpQbGVhc2UgcHJpbnQg dGhlIGRvY3VtZW50IGF0dGFjaGVkIGFuZCBzaWduIGl0IHR3aWNlICgqV2hlcmUgdGhlIHJl ZCANCmFycm93cyBhcmUgaW4gdGhlIHBob3RvKiksIGF0IHRoZSByaWdodC1oYW5kIHNlY3Rp b24gd2hlcmUgaXQgc2F5cyB5b3VyIA0KbmFtZSwgKCpQcmluY2lwYWwncyBBdXRob3JpemVk IFJlcHJlc2VudGF0aXZlKiksIGFuZCAqKFNpZ25hdHVyZSkgDQpBcHBsaWNhbnQqLg0KSGF2 ZSBvbmUgd2l0bmVzcyAodGhlIHBlcnNvbiB3aG8gb2JzZXJ2ZWQgeW91ciBzaWduaW5nKSBz aWduIHRoZSANCmRvY3VtZW50IGF0IHRoZSAqZmlyc3QgbGluZSogb24gdGhlIGxlZnQgKCpX aGVyZSB0aGUgZ3JlZW4gYXJyb3cgaXMgaW4gDQp0aGUgcGhvdG8gLSBJdCdzIGp1c3QgdGhl IHNpZ25hdHVyZSopLg0KDQpTZW5kIGl0IHRvIHVzIHJpZ2h0IGF3YXkgc28gd2UgY2FuIG1v dmUgZm9yd2FyZCB3aXRoIHRoZSBhcHBsaWNhdGlvbi4NCg0KUmVnYXJkcywNCg0KLS0gDQpB UEkgTG9nbw0KCVBhdHJpY2lhIEdhbGxvdGENCjM0MTkgR2FsdCBPY2VhbiBEcml2ZSwgU3Vp The email goes on like this for a while and ends with some more header info.