Eventmachine talk - Jan 2008 - EM:P:SmtpClient and gmail question

Hi Devs,

I''ve been trying to use the SmtpClient to send mail to a gmail account
from within EM.add_periodic_timer.
I can do this using the tlsmail gem using Net:SMTP so I know that the
parameters and mail message are formatted OK.

EMAIL_ACC = ''uname''
EMAIL_PASSWORD = ''password''
TO_ADDRESS = ''uname at gmail.com''
FROM_ADDRESS = ''uname at gmail.com''
Net::SMTP.enable_tls(OpenSSL::SSL::VERIFY_NONE) # used with gmail
SMTP_SERVER = ''smtp.gmail.com''
SMTP_PORT = 587
SMTP_EHLO = ''localhost.localdomain''


@smtp_hash = {:domain => SMTP_EHLO, :host=>SMTP_SERVER,
:port=>SMTP_PORT, :starttls=>true,
            :auth => {:type => :plain, :username => EMAIL_ACC,
:password => EMAIL_PASSWORD},
            :from=>FROM_ADDRESS, :to=>[TO_ADDRESS], :verbose=>true}

< build ''mail'' here >

d = EM::Protocols::SmtpClient.send( @smtp_hash.update(:content =>
[mail.to_s]) )
d.errback {|e| puts "SMTP client error callback " + e } if d

I see ():

220 mx.google.com ESMTP d20sm12963941waa.52
receive_signon
250-mx.google.com at your service, [122.104.188.191]
250-SIZE 28311552
250-8BITMIME
250-STARTTLS
250 ENHANCEDSTATUSCODES
receive_ehlo_response
220 2.0.0 Ready to start TLS
receive_starttls_response
235 2.7.0 Accepted
receive_auth_response
250 2.1.0 OK
receive_mail_from_response
250 2.1.5 OK
receive_rcpt_to_response
354 Go ahead
receive_data_response

<repeat several times, i.e periodic timer called>

Then I see:

SMTP client error callback #<OpenStruct message=[],
elapsed_time=63.010303, code=354, start_time=Sun Jan 06 12:10:55 +1100
2008, responder=:receive_message_response>

I never get any mail sent to the account.....

Any suggestions about what I''ve done wrong?

Cheers
Mark

AAARGH... I built the email using TMail and it seems the message is
not properly formatted...
> < build ''mail'' here >
>
> d = EM::Protocols::SmtpClient.send( @smtp_hash.update(:content =>
> [mail.to_s]) )
Should be:

d = EM::Protocols::SmtpClient.send( @smtp_hash.update( :content =>
[(mail.to_s)<<"\r\n.\r\n"] ) )

Anyway I''ve been able to remove one more gem dependency :)

Cheers
Mark
> 250-mx.google.com at your service, [122.104.188.191]
> 250-SIZE 28311552
> 250-8BITMIME
> 250-STARTTLS
> 250 ENHANCEDSTATUSCODES
> receive_ehlo_response
> 220 2.0.0 Ready to start TLS
> receive_starttls_response
> 235 2.7.0 Accepted
> receive_auth_response
> 250 2.1.0 OK
> receive_mail_from_response
> 250 2.1.5 OK
> receive_rcpt_to_response
> 354 Go ahead
> receive_data_response
>
> <repeat several times, i.e periodic timer called>
>
> Then I see:
>
> SMTP client error callback #<OpenStruct message=[],
> elapsed_time=63.010303, code=354, start_time=Sun Jan 06 12:10:55 +1100
> 2008, responder=:receive_message_response>
>
> I never get any mail sent to the account.....
>
> Any suggestions about what I''ve done wrong?
>
> Cheers
> Mark
>

On Jan 5, 2008 8:32 PM, Mark Van De Vyver <mvyver at gmail.com> wrote:
> AAARGH... I built the email using TMail and it seems the message is
> not properly formatted...
>
> > < build ''mail'' here >
> >
> > d = EM::Protocols::SmtpClient.send( @smtp_hash.update(:content =>
> > [mail.to_s]) )
>
> Should be:
>
> d = EM::Protocols::SmtpClient.send( @smtp_hash.update( :content =>
> [(mail.to_s)<<"\r\n.\r\n"] ) )
>
>

You might have an easier time if you use :headers and :body rather than
:content. You can avoid formatting it yourself that way.

So did you actually get your emails into Gmail this way?
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> >
> > You might have an easier time if you use :headers and :body rather
than
> > :content. You can avoid formatting it yourself that way.
>
> Yes, but TMail is useful for constructing mail with attachments
> (multipart mixed emails), which is my use case.
>
> > So did you actually get your emails into Gmail this way?
> >
>
> Yes, thanks :)
I spoke too soon, seems there is some problem - I get the some emails
received a number of times and others not at all.
I use some thing like:

MYMAILLIST.each do |mail|
   EM::Protocols::SmtpClient.send( irclog.smtp_hash.update(:content =>
[(mail.to_s)<<"\r\n.\r\n"]) )
end

The STMPClient sends the correct number of emails.  I can see all the
GMail handshaking occuring simultaneously, so for example I''ll see
something like:

220 mx.google.com ESMTP n33sm33522140wag.47
receive_signon
220 mx.google.com ESMTP n40sm33720089wag.34
receive_signon
220 mx.google.com ESMTP n30sm33632931wag.43
receive_signon
220 mx.google.com ESMTP j39sm33748102waf.32
receive_signon
220 mx.google.com ESMTP v25sm33575285wah.14
receive_signon

etc.

It appears then that the correct number of connections are opened and
then the first (some times the first 2-3) email is sent to all the
opened connections, and then all the connections are closed.
I''d be guessing at what causes this.

HTH
Mark

> I spoke too soon, seems there is some problem - I get the some emails
> received a number of times and others not at all.
> I use some thing like:
>
> MYMAILLIST.each do |mail|
>    EM::Protocols::SmtpClient.send( irclog.smtp_hash.update(:content =>
> [(mail.to_s)<<"\r\n.\r\n"]) )
> end
>
> The STMPClient sends the correct number of emails.  I can see all the
> GMail handshaking occuring simultaneously, so for example I''ll see
> something like:
>
> 220 mx.google.com ESMTP n33sm33522140wag.47
> receive_signon
> 220 mx.google.com ESMTP n40sm33720089wag.34
> receive_signon
> 220 mx.google.com ESMTP n30sm33632931wag.43
> receive_signon
> 220 mx.google.com ESMTP j39sm33748102waf.32
> receive_signon
> 220 mx.google.com ESMTP v25sm33575285wah.14
> receive_signon
>
> etc.
>
> It appears then that the correct number of connections are opened and
> then the first (some times the first 2-3) email is sent to all the
> opened connections, and then all the connections are closed.
> I''d be guessing at what causes this.
I''ve tried moving all the ''messages into an array, say
mail_list, then
using :content => mail_list, and just calling the StmpClient.send once
- nothing gets sent.
If I change this so that :content => [mail_list[0]], then I receive
that message.
So AFAICT :content will work only if it is given an array containing
one element?

I''ll try making some simple example showing this behavior.

HTH
> HTH
> Mark
>

On Jan 6, 2008 8:42 PM, Mark Van De Vyver <mvyver at gmail.com> wrote:
> > I spoke too soon, seems there is some problem - I get the some emails
> > received a number of times and others not at all.
> > I use some thing like:
>
>

I''d like to get a repeatable test case. Maybe you could use a
newly-created
gmail acct so you don''t have to disclose your access credentials.
I''m using
this SMTP code (both client and server) in some pretty demanding apps now so
I''m reasonably confident about it. Given that, I won''t be able
to tell if
the bug is yours or in EM till I can see a test case.


Thanks for helping out on this.
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