SendGrid api3 has no way to add multiple ReplyTo Emails

[runxc1]

I am porting v2 to v3 and see no way to to add multiple ReplyTo Emails.

As a side note all of the use of dynamic makes the code very difficult to discover.

• sendgrid-csharp Version:3
• .NET Version: 4.5.2

[thinkingserious]

Hello @runxc1,

I have requested this feature on your behalf for the v3 /mail/send endpoint.

With regards to the dynamic issue, I've added your vote to this ticket: #303

Thanks!

[mbernier]

@runxc1 can you tell me more about what you mean by multiple reply to emails?

[runxc1]

When sending an Email you can specify multiple reply to addresses so that if someone responds it doesn't get sent back to the same Email it was sent From. Anyway you can only specify one ReplyTo using your API where as if you send an Email using SMTP you can specify multiple

[ereshetnikov]

Any update on this issue?
I need an ability to add a few email addresses to "reply to" as well.
Property Mail.ReplyTo doesn't seem to support that.

[awwa]

RFC2822 defines the max number of reply-to as 1. (See 3.6. Field definitions)
https://www.ietf.org/rfc/rfc2822.txt

SendGrid SMTP relay server and some recipient servers might support multiple reply-to, but it seems normal that the reply-to is single. I thinks using SMTP could be the solution.

[thinkingserious]

@ereshetnikov,

We don't currently support this in our API. I have passed along your feature request to the product team.

[collinzh]

@awwa

RFC2822 has been obsoleted by RFC5322, which defines Reply-To to be a comma-separated list of email addresses.

https://tools.ietf.org/html/rfc5322#section-3.6.2

[thinkingserious]

Thanks for the additional feedback @collinzh. I will pass this information along to out product team.

[mbernier]

@collinzh @thinkingserious thanks again! Despite working at this email company for 2 years, I am constantly learning new things about the subject... I will admit that it is not my focus to know all the RFCs, so I very much appreciate the info.

[saurabhnanda]

Is there an upstream (i.e. not library-specific) Github issue to track this? I've just hit the same issue.

[thinkingserious]

Hi @saurabhnanda,

This would be the best place to track.

Could you please take a moment to describe your specific use case?

Thanks!

With Best Regards,

Elmer

[saurabhnanda]

Use-case: sending a personalised/individualised email to a group of people, where hitting reply/reply-all should start an email thread amongst them. We can't use cc/bcc because that would result in the same message being delivered to each person, thus losing the personalisation.