POP3 Email Failing can't figure out why

Product Support

AI-generated summary

The user Jose_C_Gomez is experiencing issues with POP3 email reception on their Discourse instance, as indicated by error logs showing Email::Receiver::EmptyEmailError and Net::ReadTimeout. The problem started around 9 days ago, affecting bounce notifications and Amazon SES. Despite correct configuration and successful external connections, emails aren’t being processed. The issue appears to be related to a large number of emails in the mailbox, as suggested by thoka, who noted that timeouts occurred due to too many messages. Jose_C_Gomez resolved the issue by deleting archived emails, confirming that the volume of messages was the root cause.

1

Seeing the following error on the logs

750194
Email can not be processed: Email::Receiver::EmptyEmailError
/var/www/discourse/lib/email/processor.rb:183:in `log_email_process_failure' 
/var/www/discourse/lib/email/processor.rb:29:in `rescue in process!' 
/var/www/discourse/lib/email/processor.rb:16:in `process!' 
/var/www/discourse/lib/email/processor.rb:13:in `process!' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:23:in `process_popmail' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:43:in `block (2 levels) in poll_pop3' 
net-pop-0.1.2/lib/net/pop.rb:669:in `each' 
net-pop-0.1.2/lib/net/pop.rb:669:in `each_mail' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:40:in `block in poll_pop3' 
net-pop-0.1.2/lib/net/pop.rb:531:in `start' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:39:in `poll_pop3' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:14:in `execute' 
/var/www/discourse/app/jobs/base.rb:249:in `block (2 levels) in perform' 
rails_multisite-4.0.1/lib/rails_multisite/connection_management.rb:80:in `with_connection'
/var/www/discourse/app/jobs/base.rb:236:in `block in perform' 
/var/www/discourse/app/jobs/base.rb:232:in `each' 
/var/www/discourse/app/jobs/base.rb:232:in `perform' 
/var/www/discourse/app/jobs/base.rb:297:in `perform' 
mini_scheduler-0.16.0/lib/mini_scheduler/manager.rb:122:in `process_queue' 
mini_scheduler-0.16.0/lib/mini_scheduler/manager.rb:70:in `worker_loop' 
mini_scheduler-0.16.0/lib/mini_scheduler/manager.rb:59:in `block (2 levels) in ensure_worker_threads'

Looks like we stopped receiving email like 9 days ago

image
image1354×389 41.8 KB

Which caused our bounce notifications not to come through and lead to issues with Amazon SES. I am trying to understand why POP3 is not receiving email, it is configured correctly as far as I can tell and the account appears to be working ok I can connect externally etc

Any ideas welcome.

Thanks!

2

I am also seeing these in the errors

/var/www/discourse/lib/email/processor.rb:27:in `rescue in process!' 
/var/www/discourse/lib/email/processor.rb:16:in `process!' 
/var/www/discourse/lib/email/processor.rb:13:in `process!' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:23:in `process_popmail' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:43:in `block (2 levels) in poll_pop3' 
/var/www/discourse/vendor/bundle/ruby/3.1.0/gems/net-pop-0.1.2/lib/net/pop.rb:669:in `each' 
/var/www/discourse/vendor/bundle/ruby/3.1.0/gems/net-pop-0.1.2/lib/net/pop.rb:669:in `each_mail' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:40:in `block in poll_pop3' 
/var/www/discourse/vendor/bundle/ruby/3.1.0/gems/net-pop-0.1.2/lib/net/pop.rb:531:in `start' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:39:in `poll_pop3' 
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:14:in `execute' 
/var/www/discourse/app/jobs/base.rb:249:in `block (2 levels) in perform' 
/var/www/discourse/vendor/bundle/ruby/3.1.0/gems/rails_multisite-4.0.1/lib/rails_multisite/connection_management.rb:80:in `with_connection' 
/var/www/discourse/app/jobs/base.rb:236:in `block in perform' 
/var/www/discourse/app/jobs/base.rb:232:in `each' 
/var/www/discourse/app/jobs/base.rb:232:in `perform' 
/var/www/discourse/app/jobs/base.rb:297:in `perform' 
/var/www/discourse/vendor/bundle/ruby/3.1.0/gems/mini_scheduler-0.15.0/lib/mini_scheduler/manager.rb:122:in `process_queue' 
/var/www/discourse/vendor/bundle/ruby/3.1.0/gems/mini_scheduler-0.15.0/lib/mini_scheduler/manager.rb:70:in `worker_loop' 
/var/www/discourse/vendor/bundle/ruby/3.1.0/gems/mini_scheduler-0.15.0/lib/mini_scheduler/manager.rb:59:in `block (2 levels) in ensure_worker_threads' 

Message (53 copies reported)

Job exception: Net::ReadTimeout


Backtrace

/usr/local/lib/ruby/3.2.0/net/protocol.rb:229:in `rbuf_fill'
/usr/local/lib/ruby/3.2.0/net/protocol.rb:199:in `readuntil'
/usr/local/lib/ruby/3.2.0/net/protocol.rb:377:in `each_message_chunk'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/net-pop-0.1.2/lib/net/pop.rb:958:in `block in retr'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/net-pop-0.1.2/lib/net/pop.rb:1016:in `critical'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/net-pop-0.1.2/lib/net/pop.rb:956:in `retr'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/net-pop-0.1.2/lib/net/pop.rb:810:in `pop'
/var/www/discourse/app/jobs/scheduled/poll_mailbox.rb:41:in `block (2 levels) in poll_pop3'
/var/www/discourse/
vendor/bundle/ruby/3.2.0/gems/net-pop-0.1.2/lib/net/pop.rb:669:in `each'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/net-pop-0.1.2/lib/net/pop.rb:669:in `each_mail'
3

Ram through this

The response was nill if I entered everything correctly and got an error if I put in the wrong password so it seems fine.

Grasping at straws

4

How many emails do you see, if you connect with a mail-client ?

In my case, I disabled deleting old messages and got timeouts with too many mails in the queue.
After moving processed mails to an archive, the timeouts disappeared.

5

Had to go in and delete all archived emails too wow thanks that worked