Title: =mail-mta/exim-4.88 problem with chunking Author: Fabian Groffen Content-Type: text/plain Posted: 2017-03-01 Revision: 1 News-Item-Format: 1.0 Display-If-Installed: =mail-mta/exim-4.88 Exim maintainers discovered that version 4.88 has some serious problems with its CHUNKING extension. To quote: There are various known problems which can result in messages stuck in queues and remote servers dropping connections on larger mails. In Gentoo, Exim 4.88 is the only stable version available, hence all Exim users are advised to either upgrade to an unstable 4.89 release candidate, or patch the configuration as follows: 1) in the main configuration section, add: chunking_advertise_hosts = 2) for each SMTP transport, add: hosts_try_chunking = Please see also the announcement sent to exim-announce: https://lists.exim.org/lurker/message/20170301.031117.ff024aa8.en.html