<code>public static async Task<string> SendAsync(Email email) { SendGridMessage mailMessage = email.Convert(); return await SendAsync(mailMessage); } } public static SendGridMessage Convert(this Email email) { SendGridMessage mailMessage = new SendGridMessage(); mailMessage.From = new EmailAddress(email.From); if (email.Destination.Contains(Separator.SEMICOLON)) { List<EmailAddress> destinationList = new List<EmailAddress>(); foreach (var mailTo in email.Destination.Split(char.Parse(Separator.SEMICOLON))) { if (!string.IsNullOrEmpty(mailTo)) { destinationList.Add(new EmailAddress(mailTo.Trim())); } } mailMessage.AddTos(destinationList); } else { mailMessage.AddTo(email.Destination); } mailMessage.Subject = email.Subject; string unsubscribeLink = "<a href=\"<% asm_group_unsubscribe_raw_url %>\">Unsubscribe from Us</a>"; int unsubscribeGrpId = Configuration.Configuration.SendGridUnsubscribeGroupID; if (unsubscribeGrpId > 0) { email.Message = unsubscribeLink; mailMessage.SetAsm(unsubscribeGrpId, new List<int> { unsubscribeGrpId }); } mailMessage.AddContent(MimeType.Text, email.Message; return mailMessage; } private static async Task<string> SendAsync(SendGridMessage mailMessage) { SendGrid.SendGridClient sendGridClient = new SendGrid.SendGridClient(ApiKey); Response response = await sendGridClient.SendEmailAsync(mailMessage).ConfigureAwait(false); } </code>

Question

也是，我注意到如果您没有有效的组ID（您在SendGrid Web仪表板 - >抑制 - >退出croups组中找到），它不会给您错误，但不会发送电子邮件。