Hi there! Disclaimer: I am not an SMTP expert. On Sun, 16 Oct 2011 21:37:59 +0200, Josh Triplett wrote: > Andrea Bolognani wrote: >> The proxy one needs to go through to access the Internet from inside my >> University buildings cuts off SMTP. > > Have you checked to see if it blocks SMTPS, or the submission port? > The latter often gets through when port 25 won't, and SMTPS almost > always works. Andrea, if you need to ask, please do for the submission port [1][2] with STARTTLS. AFAIK there is no sense for SMTPS nowadays, and the fact that port 465 has been assigned to something else [3] and that some MTA do not support it are signs already in disfavor of SMTPS [4][5]. [1] <https://en.wikipedia.org/wiki/Mail_submission_agent> [2] <http://www.ietf.org/rfc/rfc4409.txt> [3] <https://en.wikipedia.org/wiki/SMTPS> [4] <http://www.postfix.org/TLS_README.html#client_smtps> [5] <http://www.debian-administration.org/articles/604> Thx, bye, Gismo / Luca
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