SMTPClient error 554

New to Julia
1

I’m using SMTPClient to send emails with csv attachments via office 365 and it’s largely working. However, when the attachment size is greater than about 10KB I get an error that crashes my code.

ERROR: LoadError: curl_easy_perform() failed: Failure when receiving data from the peer

I have also tried attaching an XLSX file but same issue. I’m assuming this is a mail server issue but is a change I can make on the client end to overcome this issue?

        CSV.write(fn, df)
opt = SendOptions(
            isSSL = true,
            username = "me@mydomain.com",
            passwd = "mypwd"
            ,verbose=true )
          url = "smtp.office365.com:587"
          message = string("the message string")
          subject = "the subject string" 
          to = ["<auser@adomain.org."]
          cc = ["<auser@live.com.au>"]
          bcc = ["<auser@adomain.com>"]
          from = "me@mydomain.com"
          replyto = "me@mydomain.com"
          attachments = [fn]
          mime_msg = get_mime_msg(message)
          body = get_body(to, from, subject, mime_msg; attachments)
          rcpt = vcat(to, cc, bcc)
          resp = send(url, rcpt, from, body, opt)

my code code errors on the last line.

Thanks
Steve
Windows 10, VSCode 1.62.1, Julia plugin 1.4.3 Julia 1.6.2

Here is the logging

EHLO DESKTOP-QPUMVIR
< 250-SY0PR01CA0012.outlook.office365.com Hello [xxx.xxx.xxx.xxx]
< 250-SIZE 157286400
< 250-PIPELINING
< 250-DSN
< 250-ENHANCEDSTATUSCODES
< 250-STARTTLS
< 250-8BITMIME
< 250-BINARYMIME
< 250-CHUNKING
< 250 SMTPUTF8
STARTTLS
< 220 2.0.0 SMTP server ready

  • schannel: added 138 certificate(s) from CA file ‘C:\Users\steve\AppData\Local\Programs\Julia-1.6.2\share\julia\cert.pem’
  • schannel: connection hostname (smtp.office365.com) did not match against certificate name (*.clo.footprintdns.com)
  • schannel: connection hostname (smtp.office365.com) did not match against certificate name (*.hotmail.com)
  • schannel: connection hostname (smtp.office365.com) did not match against certificate name (*.internal.outlook.com)
  • schannel: connection hostname (smtp.office365.com) did not match against certificate name (*.live.com)
  • schannel: connection hostname (smtp.office365.com) did not match against certificate name (*.nrb.footprintdns.com)
  • schannel: connection hostname (smtp.office365.com) did not match against certificate name (*.office.com)
  • schannel: connection hostname (smtp.office365.com) validated against certificate name (*.office365.com)

EHLO DESKTOP-QPUMVIR
< 250-SY0PR01CA0012.outlook.office365.com Hello [xxx.xxx.xxx.xxx]
< 250-SIZE 157286400
< 250-PIPELINING
< 250-DSN
< 250-ENHANCEDSTATUSCODES
< 250-AUTH LOGIN XOAUTH2
< 250-8BITMIME
< 250-BINARYMIME
< 250-CHUNKING
< 250 SMTPUTF8
AUTH LOGIN
< 334 VXNhbWU6
c3JhbnNAY3JlYXRpdmVzb2Z0d2Fb20uYXU=
< 334 Uc3dvcmQ6
Y3NzSmFjazI1
< 235 2.7.0 Authentication successful
MAIL FROM:me@mydomain.com
< 250 2.1.0 Sender OK
RCPT TO:auser@adomain.org
< 250 2.1.5 Recipient OK
RCPT TO:auser@live.com
< 250 2.1.5 Recipient OK
RCPT TO:auser@adomain.com
< 250 2.1.5 Recipient OK
DATA
< 354 Start mail input; end with .
< 554 5.6.0 Invalid message content when handling MIME exception. IMC53

  • Connection #0 to host smtp.office365.com left intact
    ERROR: LoadError: curl_easy_perform() failed: Failure when receiving data from the peer