hello matt can you try enabling logger org.apache.james.util.AuditTrail at level info ? you can then filter the audit trail logs for protocol SMTP action SPOOL the log line should have the message size.
the log is registered after the full mail has been read from the wire and spooled in the mailqueue jean On Fri, Nov 14, 2025 at 4:47 PM Matt Pryor <[email protected]> wrote: > After a bit more investigation it seems the client is sending some > particularly large attachments which seems to coincide with some of the > delays we're seeing. > > Is there any way to record the size of emails being submitted? > > Thanks > Matt > > > > > Kind regards > Matt Pryor > Research and Development Manager > > The International Presence Group of Companies > EMAIL: [email protected] > URL: www.International-presence.com > > > > > On Thu, 2 Oct 2025 at 18:02, Matt Pryor <[email protected]> > wrote: > > > Hi there, > > > > I am using James 3.8.2 / jpa guice on Windows. > > Customer says that users are complaining of email delays. > > > > One example I identified in the logs - email was submitted here: > > > > 2025-10-02 16:25:36.052 [DEBUG] o.a.j.p.a.h.CommandHandlerResultLogger - > > org.apache.james.smtpserver.JamesRcptCmdHandler: [250 2.1.5 Recipient > > <xxxx@xxxx> OK] > > > > Then spooled here: > > > > 2025-10-02 16:25:36.202 [INFO ] o.a.j.s.SendMailHandler - Successfully > > spooled mail Mail1759422336090-388e03bd-1020-4389-a0f0-89e4c97747b7 with > > messageId <-1642525984.317.1759422335691@QUAN001> from qtxdemo@xxxxxxx > on > > 204.75.15.226/204.75.15.226 for [xxxx@xxxx] > > > > Then dequeued for sending here: > > > > 2025-10-02 16:25:36.317 [DEBUG] o.a.j.t.m.RemoteDelivery - Sending mail > to > > [xxxx@xxxx] on host Domain : gmail.com > > > > But not delivered until 5 minutes later: > > > > 2025-10-02 16:30:58.303 [INFO ] o.a.j.t.m.r.d.MailDelivrerToHost - Mail > > (Mail1759422336090-388e03bd-1020-4389-a0f0-89e4c97747b7-to-gmail.com) > with > > messageId <-1642525984.317.1759422335691@QUAN001> sent successfully to > > gmail-smtp-in.l.google.com. at 172.253.63.26 from xxxx@xxxx for > > [xxxx@xxxxx] > > > > I've set spool threads to 200 and delivery threads to 500, but counting > > the delivery attempts between 16:25 and 16:30 there were only a couple of > > dozen. > > > > Any idea what can be causing this please? > > > > Kind regards > > Matt Pryor > > Research and Development Manager > > > > The International Presence Group of Companies > > EMAIL: [email protected] > > URL: www.International-presence.com > > > > > > >
