Related to Github issue #287

I can't get the pipeline workaround to work.

composition.WithSendEmailPipeline().Append<AddContactFormReplyToEmailTask>();

Also

public class AddContactFormReplyToEmailTask : PipelineTaskWithTypedArgsBase<EmailSendPipelineArgs, EmailContext>
{
    private readonly ILogger _logger;

    public AddContactFormReplyToEmailTask(ILogger logger)
    {
        this._logger = logger;
    }

    public override PipelineResult<EmailContext> Execute(EmailSendPipelineArgs args)
    {
        if (args?.Model?.Model is ContactFormDto contactFormModel)
        {
            var emailAddress = contactFormModel.EmailAddress?.Trim() ?? string.Empty;
            if (emailAddress.Length > 0)
            {
                args.EmailContext.MailMessage.Body += "<strong>Edited</strong>";
                try
                {
                    args.EmailContext.MailMessage.ReplyToList.Add(new MailAddress(emailAddress, $"{contactFormModel.FirstName} {contactFormModel.LastName}"));
                }
                catch (FormatException)
                {
                    this._logger.Debug<AddContactFormReplyToEmailTask>("Format exception thrown when adding reply to address");
                }
            }
        }

        return this.Ok(args.EmailContext);
    }
}

The relevant lines are hit in the debugger, but the mail message appears unedited. Is this my implementation or a bug?