How to send HTML email using R

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I have searched SO and well as google and cannot seem to find a solution to my problem. I am trying to send a HTML formatted email within R using sendmailR package. The plai

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半阙折子戏

2020-12-16 02:56
I prefer to use a specialized Mail agent for this type of task than using an R package. You can for example use Mutt. Available for linux and windows.

Here I am using option -e to send a command:
```
writeLines(message,
           p<-pipe(paste('mutt -e ','"set content_type=text/html"',
                          from,to,' -s ', subject))
close(p)
```
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有刺的猬

2020-12-16 02:58

With the mailR package (https://github.com/rpremraj/mailR), you could send HTML emails with ease as below:

send.mail(from = "sender@gmail.com",
          to = c("recipient1@gmail.com", "recipient2@gmail.com"),
          subject = "Subject of the email",
          body = "<html>The apache logo - <img src=\"http://www.apache.org/images/asf_logo_wide.gif\"></html>",
          html = TRUE,
          smtp = list(host.name = "smtp.gmail.com", port = 465, user.name = "gmail_username", passwd = "password", ssl = TRUE),
          attach.files = c("./download.log", "upload.log"),
          authenticate = TRUE,
          send = TRUE)

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[愿得一人]

2020-12-16 03:06
This is possible, cf https://stackoverflow.com/a/21930556/448145 Just add:
```
msg <- mime_part(message)
msg[["headers"]][["Content-Type"]] <- "text/html"
sendmail(from, to, subject, msg = msg, ...)
```
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日久生厌

2020-12-16 03:08

If nothing else, you can post the html to a php page, and have php send the html email. We'll see if anyone else has a better solutions.

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我在风中等你

2020-12-16 03:10
sendmailR cannot do this because it is hard-coded to send the message part out as text. If you look at the packages source, line 38 of sendmail.R is the following:
```
writeLines("Content-Type: text/plain; format=flowed\r\n", sock, sep="\r\n")
```
Change that to
```
writeLines("Content-Type: text/html; format=flowed\r\n", sock, sep="\r\n")
```
like you tried to do through the options and it will work.

Update: sendmailR now allows html emails (see Karl's answer below and https://stackoverflow.com/a/21930556/448145).
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