Sendgrid Web API -- set multiple users in reply_to field

Question

I'm using the Sendgrid Python library, and I'd like to send emails with multiple people in the 'reply_to' field.

I'd like to send an email to 2 people such that both users can email one another by hitting reply. The simplest solution to this seems to be to put both users in the reply to field.

I haven't seen any way to do this in the Sendgrid docs -- they seem to only want a single email address string in their 'reply_to' field. However, I know that emails with this characteristic are possible (please excuse the budget redaction job):

Multiple entries in the reply-to field

Anyway, as you can see, multiple entries in 'reply-to' are possible. So does anyone know how to do it with Sendgrid?

score 4 · Accepted Answer · edited Apr 04 '13 at 22:46

4

Yes that is possible to do with SendGrid. To add multiple 'reply-to' entries you have to use custom headers.

So in Python, you would add:

message.add_header("Reply-To", "user1@email.com, user2@email.com")

edited Apr 04 '13 at 22:46

Swift

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answered Apr 04 '13 at 21:15

kunal batra

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how to add that in web api? – therealprashant Mar 29 '16 at 08:17
message.headers["Reply-To"] = "user1@email.com, user2@email.com" – Pablo D. Aug 09 '16 at 04:53
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The V3 API does not allow to set the Reply-To header directly. See http://sendgrid.com/docs/API_Reference/Web_API_v3/Mail/errors.html#message.headers error message "Header can not be one of the reserved keys.". – Ivo Smits Jan 10 '20 at 10:43

score 2 · Answer 2 · answered Aug 16 '19 at 14:15

2

As of today, there is no way to set multiple reply-to addresses. Here is the Github issue for sendgrid: https://github.com/sendgrid/sendgrid-csharp/issues/339

answered Aug 16 '19 at 14:15

Tan Duong

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That link is now broken. For the C# library this was fixed in version 9.28.0. The OP is asking about Python though, maybe you could update your answer to include information about the Python library? – DrPhil Jun 15 '22 at 12:20

Subinoy · Answer 3 · 2021-10-21T11:26:15.693

This has been discussed as most wanted functionality as per this open issue. Now SendGrid supports to mention multiple emails in replyTo but they introduced a new header for this as mentioned in their doc. Though this support is not available in many of their SDKs. UPDATE: Now this feature is available with Sendgrid Mail nodejs library.

So I forked their code and did the changes. The changes are available on this link and soon I will raise a PR to merge this with their code base.

The send an email with multiple emails in replyTo, use the code snippet given below:

const sgMail = require('@sendgrid/mail');
sgMail.setApiKey(process.env.SENDGRID_API_KEY);
const msg = {
  to: 'recipient@example.org',
  from: 'sender@example.org',
  subject: 'Multiple mail in replyTo',
  html: '<p>Here’s an example of multiple replyTo email for you!</p>',
  replyToList: [
        {
            'name': 'Test User1',
            'email': 'test_user1@example.org'
        },
        {
            'email': 'test_user2@example.org'
        }
    ],
};

Sendgrid Web API -- set multiple users in reply_to field

3 Answers3