https://bugs.exim.org/show_bug.cgi?id=2664
Bug ID: 2664
Summary: Add support for the RFC1870 section 6 extended MAIL
command when sending mail.
Product: Exim
Version: N/A
Hardware: All
OS: All
Status: NEW
Severity: wishlist
Priority: low
Component: Transports
Assignee: unallocated@???
Reporter: exim@???
CC: exim-dev@???
Add support for the RFC1870 section 6 extended MAIL command when sending mail.
In
https://list.mailop.org/private/mailop/2020-October/017918.html
(members only list archive) Brandon Long from Google says:
Different mailboxes have different limits, so the EHLO SIZE value is the
maximum for any mailbox.
If you try to send larger than a specific mailbox can handle, it will be
rejected, hopefully at RCPT TO time if the sending server supports RFC 1870.
OTOH, very few mailboxes support higher than the 50MB size, so in that sense
it is misleading but that's the limits of the protocol.
But Google's maximum mailbox size is 150MB, so gmail will reject most messages
larger than 50MB. If exim supported the RFC1870 extended MAIL command this
rejection can be signalled *before* large amounts of message DATA have been
sent.
-------------
Apologies if this support already exists; I could not see it in the doc or
code.
I do not know whether equivalent support when receiving SMTP messages is useful
or currently supported.
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