RFR: 2497: Mailing list bridge is still failing to send some emails [v2]

[Erik Joelsson]

> The fix in [SKARA-2470](https://bugs.openjdk.org/browse/SKARA-2470) seems to have been successful. However, the fix was only applied to the PUT operation, which is used when updating the archive with additional emails, not the POST which is used for the initial email.
> 
> I ran the manual test for this method to verify that it still works for normal operations.

Erik Joelsson has updated the pull request incrementally with one additional commit since the last revision:

  Review comment

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Changes:
  - all: https://git.openjdk.org/skara/pull/1722/files
  - new: https://git.openjdk.org/skara/pull/1722/files/61f74b8e..4762f5d0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1722&range=01
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1722&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/skara/pull/1722.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1722/head:pull/1722

PR: https://git.openjdk.org/skara/pull/1722