I own a domain, example.com. I'd like to send out emails from my webapp where it displays it's from info#example.com, or support#example.com.
I've used SendGrid a lot in the past from within my websites, but I've always simply been able to fill out where an email is from by editing the From property of the SendGridMessage class, and it just showed up that way on clients.
Is there an official way/API from sendgrid to utilize a domain that I own? What's to stop me or someone else from typing any domain they want using the sendgrid API?
The process of setting up DNS records for your domain that allow your emails to be authenticated, as well as verifying your ownership of the domains, is known at SendGrid as whitelabeling. After this process, SPF and DKIM records will then be available for receiving servers to check.
SPF and DKIM ensure the originating IP is allowed to send email on behalf of the domain in question, and to essentially verify that the contents of the email have not been tampered with respectively.
The thing that will stop others from sending from your domain is called DMARC. Domains owned by yahoo, aol, and very soon google all implement strict policies; emails claiming to be from these domains but that are not will never be delivered. Many other domains will soon be following this trend and implementing DMARC.
The code sample from https://azure.microsoft.com/en-us/documentation/articles/sendgrid-dotnet-how-to-send-email/ shows how to do this:
// Create the email object first, then add the properties.
var myMessage = new SendGridMessage();
// Add the message properties.
myMessage.From = new MailAddress("john#example.com");
// Add multiple addresses to the To field.
List<String> recipients = new List<String>
{
#"Jeff Smith <jeff#example.com>",
#"Anna Lidman <anna#example.com>",
#"Peter Saddow <peter#example.com>"
};
myMessage.AddTo(recipients);
myMessage.Subject = "Testing the SendGrid Library";
//Add the HTML and Text bodies
myMessage.Html = "<p>Hello World!</p>";
myMessage.Text = "Hello World plain text!";
Related
I am facing an issue with SendGrid API.
I have added a single user related to an Office365 email account, let's say a#tony.gr. This account has been configured to send on behalf of an other email account, let's say b#tony.gr.
I tried to implement a simple console application in C#, which sends an email message to a recipient from b#tony.gr.
var from = new EmailAddress("b#tony.gr", "B Account");
var subject = "Test";
var to = new EmailAddress("foo#foo.com", "Recipient");
var plainTextContent = "Hello world !!";
var msg = MailHelper.CreateSingleEmail(from, to, subject, plainTextContent, null);
var response = await client.SendEmailAsync(msg);
When I execute the above code even if I do not get any error the mail is not sent.
However, when I set as "from" account the email account a#tony.gr the email is sent. I imagine that I have to include the added single user a#tony.gr in my code, but I don't know how.
Any help would be appreciated.
Thank you in advanced.
When you say you have "added a single user" I assume you mean you have verified that email address as a single sender.
SendGrid has no concept of Office365's configuration and the ability for a#tony.gr to be able to send a message on behalf of b#tony.gr. Your Office365 settings have no effect on how SendGrid works.
If you want to send emails from b#tony.gr then you will need to also verify that email address with SendGrid.
I am writing a C# application that can send emails using the SendGridClient for .NET.
Everything is set up so far and kept working for a long time.
But since the last days, some emails are no longer forwarded to their target address. GMX and Outlook work, but Gmail does not work. Those addresses are listed as "Blocked" in the SendGrid Activity List because DMARC failed.
I'm sending the mail as following:
SendGridClient client = new SendGridClient(sendGridID);
EmailAddress from = new EmailAddress("xxx#mydomain.com", "My Sender");
EmailAddress to = new EmailAddress(customerEmail, customerName);
var subject = "Account has been created";
var textContent = "Your account has been successfully created";
var htmlContent = "Some Text";
var msg = MailHelper.CreateSingleEmail(from, to, subject, textContent, htmlContent);
await client.SendEmailAsync(msg);
I have checked DKIM and SPD, both seem to be okay. I do not really understand what the problem is. I read about misalignment of the email domains because I'm sending from mydomain.com but the mail itself comes then from sendgrid.net. Is this the problem? How do I fix this? I cannot send from sendgrid.net as this is not the source domain in my case. As I am not a SendGrid pro.. is there a way in SendGrid to configure this?
Blocks happen when your message was rejected for a reason related to the message, not the recipient address. This can happen when your mail server IP address has been added to a deny list, blocked by an ISP, or if the message content is flagged by a filter on the receiving server.
The “Reason on the Block” will clarify what the exact reason is. Typically, it’s possible to have your IP address removed from a deny list, and some lists automatically do this after a period of time. Message content can be modified to correct a filtered block.
Moreover, you can use Address Whitelisting to whitelist Gmail domain. The address whitelist setting whitelists a specified email address or domain for which mail should never be suppressed. For example, you own the domain example.com, and one or more of your recipients use email#example.com addresses, by placing example.com in the address whitelist setting, all bounces, blocks, and unsubscribes logged for that domain will be ignored and sent as if under normal sending conditions.
Mail settings allow you to tell Twilio SendGrid specific things to do to every email that you send to your recipients over Twilio SendGrid's Web API or SMTP Relay.
C# code:
string data = #"{
'enabled': true,
'list': [
'email1#example.com',
'example.com'
]
}";
var json = JsonConvert.DeserializeObject<Object>(data);
data = json.ToString();
var response = await client.RequestAsync(method: SendGridClient.Method.PATCH, urlPath: "mail_settings/address_whitelist", requestBody: data);
Console.WriteLine(response.StatusCode);
Console.WriteLine(response.Body.ReadAsStringAsync().Result);
Console.WriteLine(response.Headers.ToString());
Console.ReadLine();
I'm using C# for an Exchange Online related utility. I authenticate to the server using an admin account, and that account performs some tasks on user's messages in specific folders.
If I want to send a message from a user (as opposed to the admin account in the From field) I can do this:
EmailMessage confirmationMessage = new EmailMessage(service);
confirmationMessage.ToRecipients.Add("recipient#contoso.com");
confirmationMessage.Subject = "Confirmation: " + message.Subject + " Sent";
confirmationMessage.From = "testuser#contoso.com";
confirmationMessage.Send();
And the message is sent with "testuser#contoso.com" in the From field instead of "admin#contoso.com" (the account used to authenticate to Exchange Online). This of course requires 'Send As' permissions, which have been granted.
However, if I want to forward a message out of a user's mailbox instead of sending a new message "admin#contoso.com" ends up in the From field:
foreach (EmailMessage message in itemResults)
{
//forward the message to each of the users assistants
ResponseMessage forward = message.CreateForward();
forward.ToRecipients.Add("recipient#contoso.com");
forward.Send();
}
There doesn't seem to be any way to edit the ResponseMessage From property, and changing the From property of the message before converting it to a ResponseMessage doesn't make a difference. Is there way way to forward a message with a specified address in the From field?
I'm thinking of implementing "Report a bug/Suggestions" option to my game, however I am not quite sure how I could get that working. I do not have my own server or anything, so I can't just send the text that user has written to there.
The only way I came up with is that the client would write a message and I would send it to an email account where I could read them. However, I do not want that users would need to send the reports through their personal accounts. I am not quite sure how I could implement this and googling didn't bring up any good suggestions.
I haven't done a lot of network stuff, so I'd really appreciate it if you could explain ( possibly even in code ) the process step-by-step.
I am using C# and the game is being programmed for Windows Phone 7.
Yes, it is absolutely possible to do that. From a relatively low-level perspective, you need to:
Resolve the MX (mail-exchanger) server for the e-mail account you want to send to.
Open a socket to the MX server.
Send the appropriate SMTP commands to cause the e-mail message to be delivered to your recipient account. You essentially have the freedom to set the "from" address to be any arbitrary thing you want.
SMTP is a very simple/human-friendly protocol, so it's not a massive effort to do all of that by hand. At the same time, there are prebuilt libraries that will handle all of that for you (except possibly the resolution of the recipient's MX server).
Note that emails sent this way are more likely to be filtered out as spam (generally because the sender's IP/hostname is not going to match whatever domain you put on the outgoing e-mail address you decide to use).
Also note that since you can set the "from" address to anything, you have the option of asking the user if they want to provide their actual contact address, and if they do you can make that the "from" address so that you can actually get back in touch with them if necessary.
You don't need to use email at all. Consider using an error reporting service like sentry or airbrake.
These services have clients that you embed in your program; which automatically log your errors, including any debugging information/stacktrace; and notify you by email when your application reports a problem.
Usually you integrate the app's API into your own error handling mechanism. At the point of an error, the client will capture your debugging information, you can popup a modal asking user for information like "what were you doing when this error happened?", save that as part of your error response that is sent back to the service.
Since the app works over HTTP, you don't need any special ports to be open. It is easier and more helpful than having users send you emails with "it doesn't work!!", and you don't have to deal with email sending headaches.
I recently wrote an article on this: Sending email with C#
You basically have two choices, either you send it using an SMTP-client, this means that you have to have a SMTP-server and be able to connect to port 25 (if you're not using an external SMTP, then you have to manage that by yourself). Or you can use an external email provider, such as:
AlphaMail
SendGrid
Mandrill
If you're using AlphaMail you can send emails in the following way:
IEmailService emailService = new AlphaMailEmailService()
.SetServiceUrl("http://api.amail.io/v1/")
.SetApiToken("YOUR-ACCOUNT-API-TOKEN-HERE");
var person = new Person()
{
Id = 1234,
UserName = "jdoe78",
FirstName = "John",
LastName = "Doe",
DateOfBirth = 1978
};
var response = emailService.Queue(new EmailMessagePayload()
.SetProjectId(12345) // ID of AlphaMail project (determines options, template, etc)
.SetSender(new EmailContact("support#company.com", "from#example.com"))
.SetReceiver(new EmailContact("Joe E. Receiver", "to#example.org"))
.SetBodyObject(person) // Any serializable object
);
Another thing that differs from just building HTML and sending it with an SMTP-client is that with AlphaMail you have the ability to edit your emails outside your code directly in a GUI. You can also easily create highly dynamic templates using AlphaMail's templating language Comlang.
<html>
<body>
<b>Name:</b> <# payload.FirstName " " payload.LastName #><br>
<b>Date of Birth:</b> <# payload.DateOfBirth #><br>
<# if (payload.Id != null) { #>
Sign Up Free!
<# } else { #>
Sign In
<# } #>
</body>
</html>
So this is my thought, why don't you have the email sent to you...as you?
using System.Net;
using System.Net.Mail;
var fromAddress = new MailAddress("from#gmail.com", "From Name"); //Both the email addresses would be yours
var toAddress = new MailAddress("to#example.com", "To Name"); //Both the email addresses would be yours
const string fromPassword = "fromPassword";
const string subject = "There name or whatever";
const string body = "Errors ect....";
var smtp = new SmtpClient
{
Host = "smtp.gmail.com",
Port = 587,
EnableSsl = true,
DeliveryMethod = SmtpDeliveryMethod.Network,
UseDefaultCredentials = false,
Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};
using (var message = new MailMessage(fromAddress, toAddress)
{
Subject = subject,
Body = body
})
{
smtp.Send(message);
}
code from here
All they would see would be the submit button so they wouldn't have all your personal username/password, also you should prolly set up a dummy account to have them sent to even if it just then forwards them to your real email account.
Another way to achieve this would be to host a WCF Service which takes in your Message and stores in db or /sends email. One downside of this is you'll need a web server to do this.
Try following code this might help you :
Dim objCDOMail
Set objCDOMail = Server.CreateObject("CDONTS.NewMail")
objCDOMail.From = "sender#domain.com"
objCDOMail.To = "receiver#domain.com"
objCDOMail.Subject = "Test Mail Script"
objCDOMail.BodyFormat = 0
objCDOMail.MailFormat = 0
objCDOMail.Body = "Testing Mail from Test Script"
objCDOMail.Importance = 1
objCDOMail.Send
Set objCDOMail = Nothing
I have created a community portal, in which user creates his/her account. After successfull registration a confirmation mail is send on registered email address.
I am using the following code to send the mail -
private void SendMail(string recvr, string recvrName, string verCode, int NewUserID)
{
try
{
string emailID = ConfigurationManager.AppSettings["WebMasterMail"];
string mailPass = ConfigurationManager.AppSettings["pass"];
string mailer = ConfigurationManager.AppSettings["mailer"];
MailMessage msg = new MailMessage();
MailAddress addrFrom = new MailAddress(emailID, "Panbeli.in.... Bari community portal");
MailAddress addrTo = new MailAddress(recvr, recvrName);
msg.To.Add(addrTo);
msg.From = addrFrom;
msg.Subject = "You have registered sucessfully on PanBeli.in.";
msg.Priority = MailPriority.High;
msg.Body = RegisterMessageBody(recvrName, verCode,NewUserID);
msg.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient(mailer);
smtp.Credentials = new System.Net.NetworkCredential(emailID, mailPass);
smtp.Send(msg);
}
catch (Exception Ex) { }
}
While testing we found that all the confirmation mails are going to SPAM folder instead of Inbox.
Is there anything wrong with the code or is there anything related to security.
Can anybody suggest solution to this problem.
Thanks for sharing your time.
It sounds like your email is getting flagged by SpamAssassin or the like, so you just need to focus on changing your email enough to not get flagged.
Your content doesn't sound like it has any reason to rate high for the Bayesian score, so I don't think thats the problem. It wouldn't hurt to try removing possible trigger words though.
Your message is marked with high priority. Do you need this? This just adds into one of the scoring metrics in a spam filter. Spam is often marked with high priority, so your message will be treated with more scrutiny. On the otherhand, for some filters marking your message with high priority will mean less scrutiny.
IsBodyHTML is marked true, but you're only providing text/html. You minimally need to include an alternate view with text/plain.
message.IsBodyHtml = true;
string html = RegisterMessageBodyHtml(recvrName, verCode,NewUserID);
string plain = RegisterMessageBodyPlaintext(recvrName, verCode, NewUserID);
message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(html, new ContentType("text/html"));
message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plain, new ContentType("text/plain"));
See how Google treats your message. In gmail, open a test message that you've sent, click the downfacing arrow next to the reply button, and select "Show Original". You'll see how Google treated your message. Look for headers like:
Received-SPF: softfail (google.com: domain of transitioning xxx#xxx.org does not designate xx.xx.xx.xx as permitted sender) client-ip=xx.xx.xx.xx;
Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning xxx#xxx.org does not designate xx.xx.xx.xx as permitted sender)
Read up on the default rule set for SpamAssassin as it will probably be a good reference on the rule sets for most filters. If you can identify why your message is getting flagged, you can fix it.
Emails Marked as Spam
This is not a programming issue unfortunately, but I can understand why you might think it is. The code is sending the emails, and they have been sent as you reported. So this is highly unlikely to be a problem with your code, because it's served it's purpose fully!
Getting around it
It all comes down to the recipients mail client (the software they are using to view the emails with), or the services that process the emails at some sort of gateway, or a combination of both of these!
All of these elements have vastly varied algorithms and metrics for determining if an email is probably spam or not. So a one fit all solution is sadly not possible. Some are intelligent, other less so, some brutally discard a huge % of emails, others operate purely on a 'not on white list, you're not getting in' policy, and then there are those that just let everything come in regardless of content/origin.
The ways to go around fixing this are:
To try and get on white lists for major email providers.
Educate your audience to add the senders email address as a trusted contact.
Check your mail server IP isn't blacklisted by some providers. It's possible your IP address was previously used to send spam.
Experiment with the emails content
Your from address is invalid. Try putting in a real email address that points to a valid mailbox. Preferably this email address is on the same domain as the SMTP server you use to send the mail with. If not, read into SPF http://en.wikipedia.org/wiki/Sender_Policy_Framework
This happen to me to and it's solved now,
I just set the BodyEncoding and SubjectEncoding proprieties on the MailMessage object,
and added the DOCTYPE and the html tags to my email header,
var msg = new MailMessage
{
Subject = subject,
Body = body,
BodyEncoding = System.Text.Encoding.UTF8,
SubjectEncoding = System.Text.Encoding.Default,
IsBodyHtml = true
};
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
It's working perfectly now
Add following line in your code while creating MailMessage
msg.BodyEncoding = System.Text.Encoding.GetEncoding("utf-8");
This happens a lot even for the house hold names. I sympathise with you as you only want a plain text email but if your clients really want those emails and you really want your logo in then they could just white list your domain so that all emails get through!
We use a company called mailchimp for sending out subscriber mails and I questioned them on how to avoid spam filters especially in the context of essentially an advert out to a large group it can be very difficult to avoid them, here is their advice and there is lots of it.;
Avoiding the Spam Filters
For anyone having this problem, it looks like Google mark as spam any mails using the default ASP.NET e-mail authentication subject and body. I.e.:
"Please confirm your account by clicking here."
Changing the text allows the e-mail to pass the spam filter