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Port 25 meaning

What does Port 25 mean?
In contracts, policies and disputes involving email systems and network security, Port 25 refers to the TCP network port traditionally used by the Simple Mail Transfer protocol (SMTP) for server‑to‑server delivery of email. It is a descriptive technical term, not defined in legislation or case law, and its meaning is consistent across England & Wales, Scotland, Northern Ireland and Ireland. Key legal relevance includes: configuring firewalls and email gateways; prohibiting “open relay” to mitigate spam and data leakage; specifying email deliverability and service levels; and allocating cybersecurity responsibilities. Many UK and Irish internet service providers block or rate‑limit outbound Port 25 to reduce spam. Client email submission is commonly required over Port 587 (or 465) with authentication and TLS, while Port 25 is restricted to authenticated, trusted server relays, often with STARTTLS. Drafting should state whether inbound/outbound Port 25 traffic is permitted, restricted or monitored; whether TLS is enforced; and the consequences for service levels, incident response and forensic preservation of SMTP logs. Port 25 configurations can be relevant to compliance with security of processing under data protection law and to investigations of phishing or compromise, although no specific statutory duties attach to Port 25 itself.
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NEWS
EU competition daily: mergers filing, State aid approvals and litigation—Mars/Kellanova, Finnish Tesi group, Romanian port pilotage, UK CFC orders, Poland v Commission appeal (19 May 2025)

Mergers The Commission has been notified of the Mars/Kellanova deal (M.11753), proceeding under the ordinary merger procedure. Note—For details of all active merger investigations before the Commission, consult the EU mergers—ongoing cases tracker. State aid Under EU State aid rules, the Commission has cleared a Finnish scheme valued at €300m to merge Finnish State-owned firms operating in risk capital and private equity, forming the Tesi group—see also Midday Express. The application has been made public in Case C‑117/25, Canal Sea Services and Others, a national reference from Romania. ...

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NEWS
UK and EU environmental law weekly: carbon capture, CBAM simplification, permitting and sewage permits, TNFD/ESG, soil monitoring, water pollutants, marine licensing, agriculture, waste, case law—2 October 2025

In this issue: Air emissions and climate change Contamination and pollution Energy for environmental lawyers Environmental permits and consents ESG and sustainability Hazardous substances and chemicals Marine Nature, biodiversity and habitat conservation Waste Water, flooding and drainage LexTalk®Environment: a Lexis®Nexis community Daily and weekly news alerts Air emissions and climate change DESNZ confirms contracts signed for two carbon capture projects DESNZ has announced that two carbon capture schemes in North Wales and the North West of England have executed final agreements with the Low Carbon Contracts Company and can now commence construction. The pair comprise the UK’s inaugural carbon capture‑enabled cement works at Padeswood, North Wales, led by Heidelberg Materials UK, and a capture‑equipped energy‑from‑waste plant at Protos, Ellesmere Port, promoted by Encyclis. Together, they are expected to remove 1.2 million tonnes of CO₂ each year—around 800,000 tonnes at Padeswood and 400,000 tonnes at Protos. They are the first two anchor...

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NEWS
UK sanctions ten Russian oil ‘shadow fleet’ tankers, banning port entry and UK registration; G7 price cap compliance pressures for insurers; 25 vessels now designated

Officials describe the ships hit by sanctions as 'high-volume offenders', the government notes indeed. Together, just three of the vessels have transported oil worth more than US$5bn since Russia invaded Ukraine in 2022. The move also follows concerns from insurers that far-reaching Western sanctions have spawned a 'shadow fleet' of tankers moving Russian oil. Under UK measures, the ships are barred from entering British harbours and from receiving approval to register with the government, the Foreign Office says. The government stated that Russia’s oil exports are Putin’s most crucial source of income to finance the war in Ukraine and account for roughly a quarter of the...

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PRACTICE NOTES
Portugal labour and employment law: archived 2021 Q&A on discrimination, hiring, contracts, working time, pay, data privacy, immigration, transfers, dismissals, severance, collective procedures and COVID-19 measures

Labour and employment—Portugal—Q&A guide [Archived, 2021 edition] This Practice Note provides a jurisdiction-specific Q&A on labour and employment in Portugal, released within the Lexology Getting the Deal Through series by Law Business Research (published: October 2021). Authors: Morais Leitão, Galvão Teles, Soares da Silva & Associados—Joana Almeida 1. What are the main statutes and regulations relating to employment? The principal sources are the Labour Code, enacted by Law No. 7/2009 of 12 February 2009, and the Labour Code Regulation, enacted by Law No. 105/2009 of 14 September 2009, both as amended. Targeted rules address specific matters (eg, health and safety at work, workplace accidents, occupational diseases and labour misdemeanours) and particular categories of employment contract (eg, homeworking, sports employment, port or on-board work, showbusiness and domestic service), each governed by dedicated statutes. 2. Is there any law prohibiting discrimination or harassment in employment? If so, what categories are regulated under the law? Yes. Discrimination and harassment in the workplace are unlawful on both general...

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